healthchecks/templates/integrations/matrix_description_formatted.html

{% load humanize %}
{% if check.status == "down" %}
    <b>{{ check.name_then_code }}</b> is <b>DOWN</b>. Last ping was {{ check.last_ping|naturaltime }}.
{% else %}
    <b>{{ check.name_then_code }}</b> is now <b>UP</b>.
{% endif %}