diff --git a/hc/front/views.py b/hc/front/views.py
index 51dd6d98..7d4bea9c 100644
--- a/hc/front/views.py
+++ b/hc/front/views.py
@@ -18,6 +18,7 @@ from hc.api.models import DEFAULT_GRACE, DEFAULT_TIMEOUT, Channel, Check, Ping
 from hc.front.forms import (AddChannelForm, AddWebhookForm, NameTagsForm,
                             TimeoutForm, AddUrlForm, AddPdForm, AddEmailForm,
                             AddOpsGenieForm)
+from pytz import all_timezones
 
 
 # from itertools recipes:
@@ -55,7 +56,8 @@ def my_checks(request):
         "tags": counter.most_common(),
         "down_tags": down_tags,
         "grace_tags": grace_tags,
-        "ping_endpoint": settings.PING_ENDPOINT
+        "ping_endpoint": settings.PING_ENDPOINT,
+        "timezones": all_timezones
     }
 
     return render(request, "front/my_checks.html", ctx)
diff --git a/static/css/my_checks.css b/static/css/my_checks.css
index 03033f7f..0dfe3e92 100644
--- a/static/css/my_checks.css
+++ b/static/css/my_checks.css
@@ -31,6 +31,10 @@
     margin: 0 50px;
 }
 
+#tz {
+    width: 300px;
+}
+
 #period-slider {
     margin: 20px 50px 80px 50px;
 }
diff --git a/static/css/selectize.bootstrap3.css b/static/css/selectize.bootstrap3.css
new file mode 100644
index 00000000..799a4114
--- /dev/null
+++ b/static/css/selectize.bootstrap3.css
@@ -0,0 +1,408 @@
+/**
+ * selectize.bootstrap3.css (v0.12.4) - Bootstrap 3 Theme
+ * Copyright (c) 2013–2015 Brian Reavis & contributors
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this
+ * file except in compliance with the License. You may obtain a copy of the License at:
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software distributed under
+ * the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF
+ * ANY KIND, either express or implied. See the License for the specific language
+ * governing permissions and limitations under the License.
+ *
+ * @author Brian Reavis <brian@thirdroute.com>
+ */
+.selectize-control.plugin-drag_drop.multi > .selectize-input > div.ui-sortable-placeholder {
+  visibility: visible !important;
+  background: #f2f2f2 !important;
+  background: rgba(0, 0, 0, 0.06) !important;
+  border: 0 none !important;
+  -webkit-box-shadow: inset 0 0 12px 4px #ffffff;
+  box-shadow: inset 0 0 12px 4px #ffffff;
+}
+.selectize-control.plugin-drag_drop .ui-sortable-placeholder::after {
+  content: '!';
+  visibility: hidden;
+}
+.selectize-control.plugin-drag_drop .ui-sortable-helper {
+  -webkit-box-shadow: 0 2px 5px rgba(0, 0, 0, 0.2);
+  box-shadow: 0 2px 5px rgba(0, 0, 0, 0.2);
+}
+.selectize-dropdown-header {
+  position: relative;
+  padding: 3px 12px;
+  border-bottom: 1px solid #d0d0d0;
+  background: #f8f8f8;
+  -webkit-border-radius: 4px 4px 0 0;
+  -moz-border-radius: 4px 4px 0 0;
+  border-radius: 4px 4px 0 0;
+}
+.selectize-dropdown-header-close {
+  position: absolute;
+  right: 12px;
+  top: 50%;
+  color: #333333;
+  opacity: 0.4;
+  margin-top: -12px;
+  line-height: 20px;
+  font-size: 20px !important;
+}
+.selectize-dropdown-header-close:hover {
+  color: #000000;
+}
+.selectize-dropdown.plugin-optgroup_columns .optgroup {
+  border-right: 1px solid #f2f2f2;
+  border-top: 0 none;
+  float: left;
+  -webkit-box-sizing: border-box;
+  -moz-box-sizing: border-box;
+  box-sizing: border-box;
+}
+.selectize-dropdown.plugin-optgroup_columns .optgroup:last-child {
+  border-right: 0 none;
+}
+.selectize-dropdown.plugin-optgroup_columns .optgroup:before {
+  display: none;
+}
+.selectize-dropdown.plugin-optgroup_columns .optgroup-header {
+  border-top: 0 none;
+}
+.selectize-control.plugin-remove_button [data-value] {
+  position: relative;
+  padding-right: 24px !important;
+}
+.selectize-control.plugin-remove_button [data-value] .remove {
+  z-index: 1;
+  /* fixes ie bug (see #392) */
+  position: absolute;
+  top: 0;
+  right: 0;
+  bottom: 0;
+  width: 17px;
+  text-align: center;
+  font-weight: bold;
+  font-size: 12px;
+  color: inherit;
+  text-decoration: none;
+  vertical-align: middle;
+  display: inline-block;
+  padding: 1px 0 0 0;
+  border-left: 1px solid rgba(0, 0, 0, 0);
+  -webkit-border-radius: 0 2px 2px 0;
+  -moz-border-radius: 0 2px 2px 0;
+  border-radius: 0 2px 2px 0;
+  -webkit-box-sizing: border-box;
+  -moz-box-sizing: border-box;
+  box-sizing: border-box;
+}
+.selectize-control.plugin-remove_button [data-value] .remove:hover {
+  background: rgba(0, 0, 0, 0.05);
+}
+.selectize-control.plugin-remove_button [data-value].active .remove {
+  border-left-color: rgba(0, 0, 0, 0);
+}
+.selectize-control.plugin-remove_button .disabled [data-value] .remove:hover {
+  background: none;
+}
+.selectize-control.plugin-remove_button .disabled [data-value] .remove {
+  border-left-color: rgba(77, 77, 77, 0);
+}
+.selectize-control.plugin-remove_button .remove-single {
+  position: absolute;
+  right: 28px;
+  top: 6px;
+  font-size: 23px;
+}
+.selectize-control {
+  position: relative;
+}
+.selectize-dropdown,
+.selectize-input,
+.selectize-input input {
+  color: #333333;
+  font-family: inherit;
+  font-size: inherit;
+  line-height: 20px;
+  -webkit-font-smoothing: inherit;
+}
+.selectize-input,
+.selectize-control.single .selectize-input.input-active {
+  background: #ffffff;
+  cursor: text;
+  display: inline-block;
+}
+.selectize-input {
+  border: 1px solid #cccccc;
+  padding: 6px 12px;
+  display: inline-block;
+  width: 100%;
+  overflow: hidden;
+  position: relative;
+  z-index: 1;
+  -webkit-box-sizing: border-box;
+  -moz-box-sizing: border-box;
+  box-sizing: border-box;
+  -webkit-box-shadow: none;
+  box-shadow: none;
+  -webkit-border-radius: 4px;
+  -moz-border-radius: 4px;
+  border-radius: 4px;
+}
+.selectize-control.multi .selectize-input.has-items {
+  padding: 5px 12px 2px;
+}
+.selectize-input.full {
+  background-color: #ffffff;
+}
+.selectize-input.disabled,
+.selectize-input.disabled * {
+  cursor: default !important;
+}
+.selectize-input.focus {
+  -webkit-box-shadow: inset 0 1px 2px rgba(0, 0, 0, 0.15);
+  box-shadow: inset 0 1px 2px rgba(0, 0, 0, 0.15);
+}
+.selectize-input.dropdown-active {
+  -webkit-border-radius: 4px 4px 0 0;
+  -moz-border-radius: 4px 4px 0 0;
+  border-radius: 4px 4px 0 0;
+}
+.selectize-input > * {
+  vertical-align: baseline;
+  display: -moz-inline-stack;
+  display: inline-block;
+  zoom: 1;
+  *display: inline;
+}
+.selectize-control.multi .selectize-input > div {
+  cursor: pointer;
+  margin: 0 3px 3px 0;
+  padding: 1px 3px;
+  background: #efefef;
+  color: #333333;
+  border: 0 solid rgba(0, 0, 0, 0);
+}
+.selectize-control.multi .selectize-input > div.active {
+  background: #428bca;
+  color: #ffffff;
+  border: 0 solid rgba(0, 0, 0, 0);
+}
+.selectize-control.multi .selectize-input.disabled > div,
+.selectize-control.multi .selectize-input.disabled > div.active {
+  color: #808080;
+  background: #ffffff;
+  border: 0 solid rgba(77, 77, 77, 0);
+}
+.selectize-input > input {
+  display: inline-block !important;
+  padding: 0 !important;
+  min-height: 0 !important;
+  max-height: none !important;
+  max-width: 100% !important;
+  margin: 0 !important;
+  text-indent: 0 !important;
+  border: 0 none !important;
+  background: none !important;
+  line-height: inherit !important;
+  -webkit-user-select: auto !important;
+  -webkit-box-shadow: none !important;
+  box-shadow: none !important;
+}
+.selectize-input > input::-ms-clear {
+  display: none;
+}
+.selectize-input > input:focus {
+  outline: none !important;
+}
+.selectize-input::after {
+  content: ' ';
+  display: block;
+  clear: left;
+}
+.selectize-input.dropdown-active::before {
+  content: ' ';
+  display: block;
+  position: absolute;
+  background: #ffffff;
+  height: 1px;
+  bottom: 0;
+  left: 0;
+  right: 0;
+}
+.selectize-dropdown {
+  position: absolute;
+  z-index: 10;
+  border: 1px solid #d0d0d0;
+  background: #ffffff;
+  margin: -1px 0 0 0;
+  border-top: 0 none;
+  -webkit-box-sizing: border-box;
+  -moz-box-sizing: border-box;
+  box-sizing: border-box;
+  -webkit-box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
+  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
+  -webkit-border-radius: 0 0 4px 4px;
+  -moz-border-radius: 0 0 4px 4px;
+  border-radius: 0 0 4px 4px;
+}
+.selectize-dropdown [data-selectable] {
+  cursor: pointer;
+  overflow: hidden;
+}
+.selectize-dropdown [data-selectable] .highlight {
+  background: rgba(255, 237, 40, 0.4);
+  -webkit-border-radius: 1px;
+  -moz-border-radius: 1px;
+  border-radius: 1px;
+}
+.selectize-dropdown [data-selectable],
+.selectize-dropdown .optgroup-header {
+  padding: 3px 12px;
+}
+.selectize-dropdown .optgroup:first-child .optgroup-header {
+  border-top: 0 none;
+}
+.selectize-dropdown .optgroup-header {
+  color: #777777;
+  background: #ffffff;
+  cursor: default;
+}
+.selectize-dropdown .active {
+  background-color: #f5f5f5;
+  color: #262626;
+}
+.selectize-dropdown .active.create {
+  color: #262626;
+}
+.selectize-dropdown .create {
+  color: rgba(51, 51, 51, 0.5);
+}
+.selectize-dropdown-content {
+  overflow-y: auto;
+  overflow-x: hidden;
+  max-height: 200px;
+  -webkit-overflow-scrolling: touch;
+}
+.selectize-control.single .selectize-input,
+.selectize-control.single .selectize-input input {
+  cursor: pointer;
+}
+.selectize-control.single .selectize-input.input-active,
+.selectize-control.single .selectize-input.input-active input {
+  cursor: text;
+}
+.selectize-control.single .selectize-input:after {
+  content: ' ';
+  display: block;
+  position: absolute;
+  top: 50%;
+  right: 17px;
+  margin-top: -3px;
+  width: 0;
+  height: 0;
+  border-style: solid;
+  border-width: 5px 5px 0 5px;
+  border-color: #333333 transparent transparent transparent;
+}
+.selectize-control.single .selectize-input.dropdown-active:after {
+  margin-top: -4px;
+  border-width: 0 5px 5px 5px;
+  border-color: transparent transparent #333333 transparent;
+}
+.selectize-control.rtl.single .selectize-input:after {
+  left: 17px;
+  right: auto;
+}
+.selectize-control.rtl .selectize-input > input {
+  margin: 0 4px 0 -2px !important;
+}
+.selectize-control .selectize-input.disabled {
+  opacity: 0.5;
+  background-color: #ffffff;
+}
+.selectize-dropdown,
+.selectize-dropdown.form-control {
+  height: auto;
+  padding: 0;
+  margin: 2px 0 0 0;
+  z-index: 1000;
+  background: #ffffff;
+  border: 1px solid #cccccc;
+  border: 1px solid rgba(0, 0, 0, 0.15);
+  -webkit-border-radius: 4px;
+  -moz-border-radius: 4px;
+  border-radius: 4px;
+  -webkit-box-shadow: 0 6px 12px rgba(0, 0, 0, 0.175);
+  box-shadow: 0 6px 12px rgba(0, 0, 0, 0.175);
+}
+.selectize-dropdown .optgroup-header {
+  font-size: 12px;
+  line-height: 1.42857143;
+}
+.selectize-dropdown .optgroup:first-child:before {
+  display: none;
+}
+.selectize-dropdown .optgroup:before {
+  content: ' ';
+  display: block;
+  height: 1px;
+  margin: 9px 0;
+  overflow: hidden;
+  background-color: #e5e5e5;
+  margin-left: -12px;
+  margin-right: -12px;
+}
+.selectize-dropdown-content {
+  padding: 5px 0;
+}
+.selectize-dropdown-header {
+  padding: 6px 12px;
+}
+.selectize-input {
+  min-height: 34px;
+}
+.selectize-input.dropdown-active {
+  -webkit-border-radius: 4px;
+  -moz-border-radius: 4px;
+  border-radius: 4px;
+}
+.selectize-input.dropdown-active::before {
+  display: none;
+}
+.selectize-input.focus {
+  border-color: #66afe9;
+  outline: 0;
+  -webkit-box-shadow: inset 0 1px 1px rgba(0,0,0,.075), 0 0 8px rgba(102, 175, 233, 0.6);
+  box-shadow: inset 0 1px 1px rgba(0,0,0,.075), 0 0 8px rgba(102, 175, 233, 0.6);
+}
+.has-error .selectize-input {
+  border-color: #a94442;
+  -webkit-box-shadow: inset 0 1px 1px rgba(0, 0, 0, 0.075);
+  box-shadow: inset 0 1px 1px rgba(0, 0, 0, 0.075);
+}
+.has-error .selectize-input:focus {
+  border-color: #843534;
+  -webkit-box-shadow: inset 0 1px 1px rgba(0, 0, 0, 0.075), 0 0 6px #ce8483;
+  box-shadow: inset 0 1px 1px rgba(0, 0, 0, 0.075), 0 0 6px #ce8483;
+}
+.selectize-control.multi .selectize-input.has-items {
+  padding-left: 9px;
+  padding-right: 9px;
+}
+.selectize-control.multi .selectize-input > div {
+  -webkit-border-radius: 3px;
+  -moz-border-radius: 3px;
+  border-radius: 3px;
+}
+.form-control.selectize-control {
+  padding: 0;
+  height: auto;
+  border: none;
+  background: none;
+  -webkit-box-shadow: none;
+  box-shadow: none;
+  -webkit-border-radius: 0;
+  -moz-border-radius: 0;
+  border-radius: 0;
+}
diff --git a/static/js/checks.js b/static/js/checks.js
index b9394e72..473af3cc 100644
--- a/static/js/checks.js
+++ b/static/js/checks.js
@@ -105,7 +105,7 @@ $(function () {
         periodSlider.noUiSlider.set(this.dataset.timeout);
         graceSlider.noUiSlider.set(this.dataset.grace);
         $("#schedule").val(this.dataset.schedule);
-        $("#tz").val(this.dataset.tz);
+        document.getElementById("tz").selectize.setValue(this.dataset.tz);
 
         if (this.dataset.kind == "cron") {
             $("#type-simple").removeClass("active");
@@ -202,6 +202,7 @@ $(function () {
         return false;
     });
 
+    $("#tz").selectize();
 
     var clipboard = new Clipboard('button.copy-link');
     $("button.copy-link").mouseout(function(e) {
diff --git a/static/js/selectize.min.js b/static/js/selectize.min.js
new file mode 100644
index 00000000..d11be61f
--- /dev/null
+++ b/static/js/selectize.min.js
@@ -0,0 +1,3 @@
+/*! selectize.js - v0.12.4 | https://github.com/selectize/selectize.js | Apache License (v2) */
+!function(a,b){"function"==typeof define&&define.amd?define("sifter",b):"object"==typeof exports?module.exports=b():a.Sifter=b()}(this,function(){var a=function(a,b){this.items=a,this.settings=b||{diacritics:!0}};a.prototype.tokenize=function(a){if(a=e(String(a||"").toLowerCase()),!a||!a.length)return[];var b,c,d,g,i=[],j=a.split(/ +/);for(b=0,c=j.length;b<c;b++){if(d=f(j[b]),this.settings.diacritics)for(g in h)h.hasOwnProperty(g)&&(d=d.replace(new RegExp(g,"g"),h[g]));i.push({string:j[b],regex:new RegExp(d,"i")})}return i},a.prototype.iterator=function(a,b){var c;c=g(a)?Array.prototype.forEach||function(a){for(var b=0,c=this.length;b<c;b++)a(this[b],b,this)}:function(a){for(var b in this)this.hasOwnProperty(b)&&a(this[b],b,this)},c.apply(a,[b])},a.prototype.getScoreFunction=function(a,b){var c,e,f,g,h;c=this,a=c.prepareSearch(a,b),f=a.tokens,e=a.options.fields,g=f.length,h=a.options.nesting;var i=function(a,b){var c,d;return a?(a=String(a||""),d=a.search(b.regex),d===-1?0:(c=b.string.length/a.length,0===d&&(c+=.5),c)):0},j=function(){var a=e.length;return a?1===a?function(a,b){return i(d(b,e[0],h),a)}:function(b,c){for(var f=0,g=0;f<a;f++)g+=i(d(c,e[f],h),b);return g/a}:function(){return 0}}();return g?1===g?function(a){return j(f[0],a)}:"and"===a.options.conjunction?function(a){for(var b,c=0,d=0;c<g;c++){if(b=j(f[c],a),b<=0)return 0;d+=b}return d/g}:function(a){for(var b=0,c=0;b<g;b++)c+=j(f[b],a);return c/g}:function(){return 0}},a.prototype.getSortFunction=function(a,c){var e,f,g,h,i,j,k,l,m,n,o;if(g=this,a=g.prepareSearch(a,c),o=!a.query&&c.sort_empty||c.sort,m=function(a,b){return"$score"===a?b.score:d(g.items[b.id],a,c.nesting)},i=[],o)for(e=0,f=o.length;e<f;e++)(a.query||"$score"!==o[e].field)&&i.push(o[e]);if(a.query){for(n=!0,e=0,f=i.length;e<f;e++)if("$score"===i[e].field){n=!1;break}n&&i.unshift({field:"$score",direction:"desc"})}else 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d=this.prepareSearch(a,b),b=d.options,a=d.query,f=b.score||g.getScoreFunction(d),a.length?g.iterator(g.items,function(a,e){c=f(a),(b.filter===!1||c>0)&&d.items.push({score:c,id:e})}):g.iterator(g.items,function(a,b){d.items.push({score:1,id:b})}),e=g.getSortFunction(d,b),e&&d.items.sort(e),d.total=d.items.length,"number"==typeof b.limit&&(d.items=d.items.slice(0,b.limit)),d};var b=function(a,b){return"number"==typeof a&&"number"==typeof b?a>b?1:a<b?-1:0:(a=i(String(a||"")),b=i(String(b||"")),a>b?1:b>a?-1:0)},c=function(a,b){var c,d,e,f;for(c=1,d=arguments.length;c<d;c++)if(f=arguments[c])for(e in f)f.hasOwnProperty(e)&&(a[e]=f[e]);return a},d=function(a,b,c){if(a&&b){if(!c)return a[b];for(var d=b.split(".");d.length&&(a=a[d.shift()]););return a}},e=function(a){return(a+"").replace(/^\s+|\s+$|/g,"")},f=function(a){return(a+"").replace(/([.?*+^$[\]\\(){}|-])/g,"\\$1")},g=Array.isArray||"undefined"!=typeof $&&$.isArray||function(a){return"[object 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d=function(){c.close(),c.setTextboxValue(""),c.setActiveItem(null),c.setActiveOption(null),c.setCaret(c.items.length),c.refreshState(),b&&b.focus&&b.focus(),c.ignoreFocus=!1,c.trigger("blur")};c.ignoreFocus=!0,c.settings.create&&c.settings.createOnBlur?c.createItem(null,!1,d):d()}},onOptionHover:function(a){this.ignoreHover||this.setActiveOption(a.currentTarget,!1)},onOptionSelect:function(b){var c,d,e=this;b.preventDefault&&(b.preventDefault(),b.stopPropagation()),d=a(b.currentTarget),d.hasClass("create")?e.createItem(null,function(){e.settings.closeAfterSelect&&e.close()}):(c=d.attr("data-value"),"undefined"!=typeof c&&(e.lastQuery=null,e.setTextboxValue(""),e.addItem(c),e.settings.closeAfterSelect?e.close():!e.settings.hideSelected&&b.type&&/mouse/.test(b.type)&&e.setActiveOption(e.getOption(c))))},onItemSelect:function(a){var b=this;b.isLocked||"multi"===b.settings.mode&&(a.preventDefault(),b.setActiveItem(a.currentTarget,a))},load:function(a){var b=this,c=b.$wrapper.addClass(b.settings.loadingClass);b.loading++,a.apply(b,[function(a){b.loading=Math.max(b.loading-1,0),a&&a.length&&(b.addOption(a),b.refreshOptions(b.isFocused&&!b.isInputHidden)),b.loading||c.removeClass(b.settings.loadingClass),b.trigger("load",a)}])},setTextboxValue:function(a){var b=this.$control_input,c=b.val()!==a;c&&(b.val(a).triggerHandler("update"),this.lastValue=a)},getValue:function(){return this.tagType===v&&this.$input.attr("multiple")?this.items:this.items.join(this.settings.delimiter)},setValue:function(a,b){var c=b?[]:["change"];E(this,c,function(){this.clear(b),this.addItems(a,b)})},setActiveItem:function(b,c){var d,e,f,g,h,i,j,k,l=this;if("single"!==l.settings.mode){if(b=a(b),!b.length)return 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e,f,g,h,i,j=this;j.$activeOption&&j.$activeOption.removeClass("active"),j.$activeOption=null,b=a(b),b.length&&(j.$activeOption=b.addClass("active"),!c&&y(c)||(e=j.$dropdown_content.height(),f=j.$activeOption.outerHeight(!0),c=j.$dropdown_content.scrollTop()||0,g=j.$activeOption.offset().top-j.$dropdown_content.offset().top+c,h=g,i=g-e+f,g+f>e+c?j.$dropdown_content.stop().animate({scrollTop:i},d?j.settings.scrollDuration:0):g<c&&j.$dropdown_content.stop().animate({scrollTop:h},d?j.settings.scrollDuration:0)))},selectAll:function(){var a=this;"single"!==a.settings.mode&&(a.$activeItems=Array.prototype.slice.apply(a.$control.children(":not(input)").addClass("active")),a.$activeItems.length&&(a.hideInput(),a.close()),a.focus())},hideInput:function(){var a=this;a.setTextboxValue(""),a.$control_input.css({opacity:0,position:"absolute",left:a.rtl?1e4:-1e4}),a.isInputHidden=!0},showInput:function(){this.$control_input.css({opacity:1,position:"relative",left:0}),this.isInputHidden=!1},focus:function(){var a=this;a.isDisabled||(a.ignoreFocus=!0,a.$control_input[0].focus(),window.setTimeout(function(){a.ignoreFocus=!1,a.onFocus()},0))},blur:function(a){this.$control_input[0].blur(),this.onBlur(null,a)},getScoreFunction:function(a){return this.sifter.getScoreFunction(a,this.getSearchOptions())},getSearchOptions:function(){var a=this.settings,b=a.sortField;return"string"==typeof b&&(b=[{field:b}]),{fields:a.searchField,conjunction:a.searchConjunction,sort:b}},search:function(b){var c,d,e,f=this,g=f.settings,h=this.getSearchOptions();if(g.score&&(e=f.settings.score.apply(this,[b]),"function"!=typeof e))throw new Error('Selectize "score" setting must be a function that returns a 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c=t.optgroups[a].$order||0,d=t.optgroups[b].$order||0;return c-d}),n=document.createDocumentFragment(),c=0,g=i.length;c<g;c++)l=i[c],t.optgroups.hasOwnProperty(l)&&h[l].childNodes.length?(o=document.createDocumentFragment(),o.appendChild(t.render("optgroup_header",t.optgroups[l])),o.appendChild(h[l]),n.appendChild(t.render("optgroup",a.extend({},t.optgroups[l],{html:K(o),dom:o})))):n.appendChild(h[l]);if(w.html(n),t.settings.highlight&&v.query.length&&v.tokens.length)for(w.removeHighlight(),c=0,g=v.tokens.length;c<g;c++)d(w,v.tokens[c].regex);if(!t.settings.hideSelected)for(c=0,g=t.items.length;c<g;c++)t.getOption(t.items[c]).addClass("selected");p=t.canCreate(u),p&&(w.prepend(t.render("option_create",{input:u})),s=a(w[0].childNodes[0])),t.hasOptions=v.items.length>0||p,t.hasOptions?(v.items.length>0?(r=x&&t.getOption(x),r&&r.length?q=r:"single"===t.settings.mode&&t.items.length&&(q=t.getOption(t.items[0])),q&&q.length||(q=s&&!t.settings.addPrecedence?t.getAdjacentOption(s,1):w.find("[data-selectable]:first"))):q=s,t.setActiveOption(q),b&&!t.isOpen&&t.open()):(t.setActiveOption(null),b&&t.isOpen&&t.close())},addOption:function(b){var c,d,e,f=this;if(a.isArray(b))for(c=0,d=b.length;c<d;c++)f.addOption(b[c]);else(e=f.registerOption(b))&&(f.userOptions[e]=!0,f.lastQuery=null,f.trigger("option_add",e,b))},registerOption:function(a){var b=z(a[this.settings.valueField]);return"undefined"!=typeof b&&null!==b&&!this.options.hasOwnProperty(b)&&(a.$order=a.$order||++this.order,this.options[b]=a,b)},registerOptionGroup:function(a){var b=z(a[this.settings.optgroupValueField]);return!!b&&(a.$order=a.$order||++this.order,this.optgroups[b]=a,b)},addOptionGroup:function(a,b){b[this.settings.optgroupValueField]=a,(a=this.registerOptionGroup(b))&&this.trigger("optgroup_add",a,b)},removeOptionGroup:function(a){this.optgroups.hasOwnProperty(a)&&(delete this.optgroups[a],this.renderCache={},this.trigger("optgroup_remove",a))},clearOptionGroups:function(){this.optgroups={},this.renderCache={},this.trigger("optgroup_clear")},updateOption:function(b,c){var d,e,f,g,h,i,j,k=this;if(b=z(b),f=z(c[k.settings.valueField]),null!==b&&k.options.hasOwnProperty(b)){if("string"!=typeof f)throw new Error("Value must be set in option data");j=k.options[b].$order,f!==b&&(delete k.options[b],g=k.items.indexOf(b),g!==-1&&k.items.splice(g,1,f)),c.$order=c.$order||j,k.options[f]=c,h=k.renderCache.item,i=k.renderCache.option,h&&(delete h[b],delete h[f]),i&&(delete i[b],delete i[f]),k.items.indexOf(f)!==-1&&(d=k.getItem(b),e=a(k.render("item",c)),d.hasClass("active")&&e.addClass("active"),d.replaceWith(e)),k.lastQuery=null,k.isOpen&&k.refreshOptions(!1)}},removeOption:function(a,b){var c=this;a=z(a);var d=c.renderCache.item,e=c.renderCache.option;d&&delete d[a],e&&delete e[a],delete c.userOptions[a],delete c.options[a],c.lastQuery=null,c.trigger("option_remove",a),c.removeItem(a,b)},clearOptions:function(){var a=this;a.loadedSearches={},a.userOptions={},a.renderCache={},a.options=a.sifter.items={},a.lastQuery=null,a.trigger("option_clear"),a.clear()},getOption:function(a){return this.getElementWithValue(a,this.$dropdown_content.find("[data-selectable]"))},getAdjacentOption:function(b,c){var d=this.$dropdown.find("[data-selectable]"),e=d.index(b)+c;return e>=0&&e<d.length?d.eq(e):a()},getElementWithValue:function(b,c){if(b=z(b),"undefined"!=typeof b&&null!==b)for(var d=0,e=c.length;d<e;d++)if(c[d].getAttribute("data-value")===b)return a(c[d]);return a()},getItem:function(a){return this.getElementWithValue(a,this.$control.children())},addItems:function(b,c){for(var d=a.isArray(b)?b:[b],e=0,f=d.length;e<f;e++)this.isPending=e<f-1,this.addItem(d[e],c)},addItem:function(b,c){var d=c?[]:["change"];E(this,d,function(){var d,e,f,g,h,i=this,j=i.settings.mode;return b=z(b),i.items.indexOf(b)!==-1?void("single"===j&&i.close()):void(i.options.hasOwnProperty(b)&&("single"===j&&i.clear(c),"multi"===j&&i.isFull()||(d=a(i.render("item",i.options[b])),h=i.isFull(),i.items.splice(i.caretPos,0,b),i.insertAtCaret(d),(!i.isPending||!h&&i.isFull())&&i.refreshState(),i.isSetup&&(f=i.$dropdown_content.find("[data-selectable]"),i.isPending||(e=i.getOption(b),g=i.getAdjacentOption(e,1).attr("data-value"),i.refreshOptions(i.isFocused&&"single"!==j),g&&i.setActiveOption(i.getOption(g))),!f.length||i.isFull()?i.close():i.positionDropdown(),i.updatePlaceholder(),i.trigger("item_add",b,d),i.updateOriginalInput({silent:c})))))})},removeItem:function(b,c){var d,e,f,g=this;d=b instanceof 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b?f():(d.setTextboxValue(""),d.addOption(a),d.setCaret(e),d.addItem(b),d.refreshOptions(c&&"single"!==d.settings.mode),void f(a))}),i=g.apply(this,[b,h]);return"undefined"!=typeof i&&h(i),!0},refreshItems:function(){this.lastQuery=null,this.isSetup&&this.addItem(this.items),this.refreshState(),this.updateOriginalInput()},refreshState:function(){this.refreshValidityState(),this.refreshClasses()},refreshValidityState:function(){if(!this.isRequired)return!1;var a=!this.items.length;this.isInvalid=a,this.$control_input.prop("required",a),this.$input.prop("required",!a)},refreshClasses:function(){var b=this,c=b.isFull(),d=b.isLocked;b.$wrapper.toggleClass("rtl",b.rtl),b.$control.toggleClass("focus",b.isFocused).toggleClass("disabled",b.isDisabled).toggleClass("required",b.isRequired).toggleClass("invalid",b.isInvalid).toggleClass("locked",d).toggleClass("full",c).toggleClass("not-full",!c).toggleClass("input-active",b.isFocused&&!b.isInputHidden).toggleClass("dropdown-active",b.isOpen).toggleClass("has-options",!a.isEmptyObject(b.options)).toggleClass("has-items",b.items.length>0),b.$control_input.data("grow",!c&&!d)},isFull:function(){return null!==this.settings.maxItems&&this.items.length>=this.settings.maxItems},updateOriginalInput:function(a){var b,c,d,e,f=this;if(a=a||{},f.tagType===v){for(d=[],b=0,c=f.items.length;b<c;b++)e=f.options[f.items[b]][f.settings.labelField]||"",d.push('<option value="'+A(f.items[b])+'" selected="selected">'+A(e)+"</option>");d.length||this.$input.attr("multiple")||d.push('<option value="" selected="selected"></option>'),
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a=this.$control,b="body"===this.settings.dropdownParent?a.offset():a.position();b.top+=a.outerHeight(!0),this.$dropdown.css({width:a.outerWidth(),top:b.top,left:b.left})},clear:function(a){var b=this;b.items.length&&(b.$control.children(":not(input)").remove(),b.items=[],b.lastQuery=null,b.setCaret(0),b.setActiveItem(null),b.updatePlaceholder(),b.updateOriginalInput({silent:a}),b.refreshState(),b.showInput(),b.trigger("clear"))},insertAtCaret:function(b){var c=Math.min(this.caretPos,this.items.length);0===c?this.$control.prepend(b):a(this.$control[0].childNodes[c]).before(b),this.setCaret(c+1)},deleteSelection:function(b){var c,d,e,f,g,h,i,j,k,l=this;if(e=b&&b.keyCode===p?-1:1,f=G(l.$control_input[0]),l.$activeOption&&!l.settings.hideSelected&&(i=l.getAdjacentOption(l.$activeOption,-1).attr("data-value")),g=[],l.$activeItems.length){for(k=l.$control.children(".active:"+(e>0?"last":"first")),h=l.$control.children(":not(input)").index(k),e>0&&h++,c=0,d=l.$activeItems.length;c<d;c++)g.push(a(l.$activeItems[c]).attr("data-value"));b&&(b.preventDefault(),b.stopPropagation())}else(l.isFocused||"single"===l.settings.mode)&&l.items.length&&(e<0&&0===f.start&&0===f.length?g.push(l.items[l.caretPos-1]):e>0&&f.start===l.$control_input.val().length&&g.push(l.items[l.caretPos]));if(!g.length||"function"==typeof l.settings.onDelete&&l.settings.onDelete.apply(l,[g])===!1)return!1;for("undefined"!=typeof h&&l.setCaret(h);g.length;)l.removeItem(g.pop());return l.showInput(),l.positionDropdown(),l.refreshOptions(!0),i&&(j=l.getOption(i),j.length&&l.setActiveOption(j)),!0},advanceSelection:function(a,b){var c,d,e,f,g,h,i=this;0!==a&&(i.rtl&&(a*=-1),c=a>0?"last":"first",d=G(i.$control_input[0]),i.isFocused&&!i.isInputHidden?(f=i.$control_input.val().length,g=a<0?0===d.start&&0===d.length:d.start===f,g&&!f&&i.advanceCaret(a,b)):(h=i.$control.children(".active:"+c),h.length&&(e=i.$control.children(":not(input)").index(h),i.setActiveItem(null),i.setCaret(a>0?e+1:e))))},advanceCaret:function(a,b){var c,d,e=this;0!==a&&(c=a>0?"next":"prev",e.isShiftDown?(d=e.$control_input[c](),d.length&&(e.hideInput(),e.setActiveItem(d),b&&b.preventDefault())):e.setCaret(e.caretPos+a))},setCaret:function(b){var c=this;if(b="single"===c.settings.mode?c.items.length:Math.max(0,Math.min(c.items.length,b)),!c.isPending){var d,e,f,g;for(f=c.$control.children(":not(input)"),d=0,e=f.length;d<e;d++)g=a(f[d]).detach(),d<b?c.$control_input.before(g):c.$control.append(g)}c.caretPos=b},lock:function(){this.close(),this.isLocked=!0,this.refreshState()},unlock:function(){this.isLocked=!1,this.refreshState()},disable:function(){var a=this;a.$input.prop("disabled",!0),a.$control_input.prop("disabled",!0).prop("tabindex",-1),a.isDisabled=!0,a.lock()},enable:function(){var a=this;a.$input.prop("disabled",!1),a.$control_input.prop("disabled",!1).prop("tabindex",a.tabIndex),a.isDisabled=!1,a.unlock()},destroy:function(){var b=this,c=b.eventNS,d=b.revertSettings;b.trigger("destroy"),b.off(),b.$wrapper.remove(),b.$dropdown.remove(),b.$input.html("").append(d.$children).removeAttr("tabindex").removeClass("selectized").attr({tabindex:d.tabindex}).show(),b.$control_input.removeData("grow"),b.$input.removeData("selectize"),a(window).off(c),a(document).off(c),a(document.body).off(c),delete b.$input[0].selectize},render:function(b,c){var d,e,f="",g=!1,h=this;return"option"!==b&&"item"!==b||(d=z(c[h.settings.valueField]),g=!!d),g&&(y(h.renderCache[b])||(h.renderCache[b]={}),h.renderCache[b].hasOwnProperty(d))?h.renderCache[b][d]:(f=a(h.settings.render[b].apply(this,[c,A])),"option"===b||"option_create"===b?f.attr("data-selectable",""):"optgroup"===b&&(e=c[h.settings.optgroupValueField]||"",f.attr("data-group",e)),"option"!==b&&"item"!==b||f.attr("data-value",d||""),g&&(h.renderCache[b][d]=f[0]),f[0])},clearCache:function(a){var b=this;"undefined"==typeof a?b.renderCache={}:delete b.renderCache[a]},canCreate:function(a){var b=this;if(!b.settings.create)return!1;var c=b.settings.createFilter;return a.length&&("function"!=typeof c||c.apply(b,[a]))&&("string"!=typeof c||new RegExp(c).test(a))&&(!(c instanceof RegExp)||c.test(a))}}),M.count=0,M.defaults={options:[],optgroups:[],plugins:[],delimiter:",",splitOn:null,persist:!0,diacritics:!0,create:!1,createOnBlur:!1,createFilter:null,highlight:!0,openOnFocus:!0,maxOptions:1e3,maxItems:null,hideSelected:null,addPrecedence:!1,selectOnTab:!1,preload:!1,allowEmptyOption:!1,closeAfterSelect:!1,scrollDuration:60,loadThrottle:300,loadingClass:"loading",dataAttr:"data-data",optgroupField:"optgroup",valueField:"value",labelField:"text",optgroupLabelField:"label",optgroupValueField:"value",lockOptgroupOrder:!1,sortField:"$order",searchField:["text"],searchConjunction:"and",mode:null,wrapperClass:"selectize-control",inputClass:"selectize-input",dropdownClass:"selectize-dropdown",dropdownContentClass:"selectize-dropdown-content",dropdownParent:null,copyClassesToDropdown:!0,render:{}},a.fn.selectize=function(b){var c=a.fn.selectize.defaults,d=a.extend({},c,b),e=d.dataAttr,f=d.labelField,g=d.valueField,h=d.optgroupField,i=d.optgroupLabelField,j=d.optgroupValueField,k=function(b,c){var h,i,j,k,l=b.attr(e);if(l)for(c.options=JSON.parse(l),h=0,i=c.options.length;h<i;h++)c.items.push(c.options[h][g]);else{var m=a.trim(b.val()||"");if(!d.allowEmptyOption&&!m.length)return;for(j=m.split(d.delimiter),h=0,i=j.length;h<i;h++)k={},k[f]=j[h],k[g]=j[h],c.options.push(k);c.items=j}},l=function(b,c){var k,l,m,n,o=c.options,p={},q=function(a){var b=e&&a.attr(e);return"string"==typeof b&&b.length?JSON.parse(b):null},r=function(b,e){b=a(b);var i=z(b.val());if(i||d.allowEmptyOption)if(p.hasOwnProperty(i)){if(e){var j=p[i][h];j?a.isArray(j)?j.push(e):p[i][h]=[j,e]:p[i][h]=e}}else{var k=q(b)||{};k[f]=k[f]||b.text(),k[g]=k[g]||i,k[h]=k[h]||e,p[i]=k,o.push(k),b.is(":selected")&&c.items.push(i)}},s=function(b){var d,e,f,g,h;for(b=a(b),f=b.attr("label"),f&&(g=q(b)||{},g[i]=f,g[j]=f,c.optgroups.push(g)),h=a("option",b),d=0,e=h.length;d<e;d++)r(h[d],f)};for(c.maxItems=b.attr("multiple")?null:1,n=b.children(),k=0,l=n.length;k<l;k++)m=n[k].tagName.toLowerCase(),"optgroup"===m?s(n[k]):"option"===m&&r(n[k])};return this.each(function(){if(!this.selectize){var e,f=a(this),g=this.tagName.toLowerCase(),h=f.attr("placeholder")||f.attr("data-placeholder");h||d.allowEmptyOption||(h=f.children('option[value=""]').text());var i={placeholder:h,options:[],optgroups:[],items:[]};"select"===g?l(f,i):k(f,i),e=new M(f,a.extend(!0,{},c,i,b))}})},a.fn.selectize.defaults=M.defaults,a.fn.selectize.support={validity:x},M.define("drag_drop",function(b){if(!a.fn.sortable)throw new Error('The "drag_drop" plugin requires jQuery UI "sortable".');if("multi"===this.settings.mode){var c=this;c.lock=function(){var a=c.lock;return function(){var b=c.$control.data("sortable");return b&&b.disable(),a.apply(c,arguments)}}(),c.unlock=function(){var a=c.unlock;return function(){var b=c.$control.data("sortable");return b&&b.enable(),a.apply(c,arguments)}}(),c.setup=function(){var b=c.setup;return function(){b.apply(this,arguments);var d=c.$control.sortable({items:"[data-value]",forcePlaceholderSize:!0,disabled:c.isLocked,start:function(a,b){b.placeholder.css("width",b.helper.css("width")),d.css({overflow:"visible"})},stop:function(){d.css({overflow:"hidden"});var b=c.$activeItems?c.$activeItems.slice():null,e=[];d.children("[data-value]").each(function(){e.push(a(this).attr("data-value"))}),c.setValue(e),c.setActiveItem(b)}})}}()}}),M.define("dropdown_header",function(b){var c=this;b=a.extend({title:"Untitled",headerClass:"selectize-dropdown-header",titleRowClass:"selectize-dropdown-header-title",labelClass:"selectize-dropdown-header-label",closeClass:"selectize-dropdown-header-close",html:function(a){return'<div class="'+a.headerClass+'"><div class="'+a.titleRowClass+'"><span class="'+a.labelClass+'">'+a.title+'</span><a href="javascript:void(0)" class="'+a.closeClass+'">&times;</a></div></div>'}},b),c.setup=function(){var d=c.setup;return function(){d.apply(c,arguments),c.$dropdown_header=a(b.html(b)),c.$dropdown.prepend(c.$dropdown_header)}}()}),M.define("optgroup_columns",function(b){var c=this;b=a.extend({equalizeWidth:!0,equalizeHeight:!0},b),this.getAdjacentOption=function(b,c){var d=b.closest("[data-group]").find("[data-selectable]"),e=d.index(b)+c;return e>=0&&e<d.length?d.eq(e):a()},this.onKeyDown=function(){var a=c.onKeyDown;return function(b){var d,e,f,g;return!this.isOpen||b.keyCode!==j&&b.keyCode!==m?a.apply(this,arguments):(c.ignoreHover=!0,g=this.$activeOption.closest("[data-group]"),d=g.find("[data-selectable]").index(this.$activeOption),g=b.keyCode===j?g.prev("[data-group]"):g.next("[data-group]"),f=g.find("[data-selectable]"),e=f.eq(Math.min(f.length-1,d)),void(e.length&&this.setActiveOption(e)))}}();var d=function(){var a,b=d.width,c=document;return"undefined"==typeof b&&(a=c.createElement("div"),a.innerHTML='<div style="width:50px;height:50px;position:absolute;left:-50px;top:-50px;overflow:auto;"><div style="width:1px;height:100px;"></div></div>',a=a.firstChild,c.body.appendChild(a),b=d.width=a.offsetWidth-a.clientWidth,c.body.removeChild(a)),b},e=function(){var e,f,g,h,i,j,k;if(k=a("[data-group]",c.$dropdown_content),f=k.length,f&&c.$dropdown_content.width()){if(b.equalizeHeight){for(g=0,e=0;e<f;e++)g=Math.max(g,k.eq(e).height());k.css({height:g})}b.equalizeWidth&&(j=c.$dropdown_content.innerWidth()-d(),h=Math.round(j/f),k.css({width:h}),f>1&&(i=j-h*(f-1),k.eq(f-1).css({width:i})))}};(b.equalizeHeight||b.equalizeWidth)&&(B.after(this,"positionDropdown",e),B.after(this,"refreshOptions",e))}),M.define("remove_button",function(b){b=a.extend({label:"&times;",title:"Remove",className:"remove",append:!0},b);var c=function(b,c){c.className="remove-single";var d=b,e='<a href="javascript:void(0)" class="'+c.className+'" tabindex="-1" title="'+A(c.title)+'">'+c.label+"</a>",f=function(a,b){return a+b};b.setup=function(){var g=d.setup;return function(){if(c.append){var h=a(d.$input.context).attr("id"),i=(a("#"+h),d.settings.render.item);d.settings.render.item=function(a){return f(i.apply(b,arguments),e)}}g.apply(b,arguments),b.$control.on("click","."+c.className,function(a){a.preventDefault(),d.isLocked||d.clear()})}}()},d=function(b,c){var d=b,e='<a href="javascript:void(0)" class="'+c.className+'" tabindex="-1" title="'+A(c.title)+'">'+c.label+"</a>",f=function(a,b){var c=a.search(/(<\/[^>]+>\s*)$/);return a.substring(0,c)+b+a.substring(c)};b.setup=function(){var g=d.setup;return function(){if(c.append){var h=d.settings.render.item;d.settings.render.item=function(a){return f(h.apply(b,arguments),e)}}g.apply(b,arguments),b.$control.on("click","."+c.className,function(b){if(b.preventDefault(),!d.isLocked){var c=a(b.currentTarget).parent();d.setActiveItem(c),d.deleteSelection()&&d.setCaret(d.items.length)}})}}()};return"single"===this.settings.mode?void c(this,b):void d(this,b)}),M.define("restore_on_backspace",function(a){var b=this;a.text=a.text||function(a){return a[this.settings.labelField]},this.onKeyDown=function(){var c=b.onKeyDown;return function(b){var d,e;return b.keyCode===p&&""===this.$control_input.val()&&!this.$activeItems.length&&(d=this.caretPos-1,d>=0&&d<this.items.length)?(e=this.options[this.items[d]],this.deleteSelection(b)&&(this.setTextboxValue(a.text.apply(this,[e])),this.refreshOptions(!0)),void b.preventDefault()):c.apply(this,arguments)}}()}),M});
\ No newline at end of file
diff --git a/templates/base.html b/templates/base.html
index 5f150e34..edb3dedd 100644
--- a/templates/base.html
+++ b/templates/base.html
@@ -17,6 +17,7 @@
     <link rel="stylesheet" href="{% static 'css/icomoon.css' %}" type="text/css">
     <link rel="stylesheet" href="{% static 'css/nouislider.min.css' %}" type="text/css">
     <link rel="stylesheet" href="{% static 'css/nouislider.pips.css' %}" type="text/css">
+    <link rel="stylesheet" href="{% static 'css/selectize.bootstrap3.css' %}" type="text/css">
     <link rel="stylesheet" href="{% static 'css/snippet-copy.css' %}" type="text/css">
     <link rel="stylesheet" href="{% static 'css/base.css' %}" type="text/css">
     <link rel="stylesheet" href="{% static 'css/docs.css' %}" type="text/css">
diff --git a/templates/front/my_checks.html b/templates/front/my_checks.html
index 052ece40..61281e88 100644
--- a/templates/front/my_checks.html
+++ b/templates/front/my_checks.html
@@ -149,8 +149,11 @@
                         </div>
                         <div class="form-group">
                             <label for="schedule">Server's Timezone</label>
+                            <br />
                             <select id="tz" name="tz" class="form-control">
                                 <option>UTC</option>
+                                {% for tz in timezones %}
+                                <option>{{ tz }}</option>{% endfor %}
                             </select>
                         </div>
                     </div>
@@ -316,6 +319,7 @@
 {% compress js %}
 <script src="{% static 'js/jquery-2.1.4.min.js' %}"></script>
 <script src="{% static 'js/bootstrap.min.js' %}"></script>
+<script src="{% static 'js/selectize.min.js' %}"></script>
 <script src="{% static 'js/nouislider.min.js' %}"></script>
 <script src="{% static 'js/clipboard.min.js' %}"></script>
 <script src="{% static 'js/snippet-copy.js' %}"></script>