{% if invalid_datespecs %}
{% blocktrans trimmed %}
The following events were found in course content that are not present
in the database:
{% endblocktrans %}
{% for datespec, locations in invalid_datespecs %}
{{ datespec }}:
{% for location in locations %}
{{ location }}
{% endfor %}
{% endfor %}
{% trans "Unrecognized events were found." %}
{% blocktrans trimmed %}
Check the "Calendar" functions in the instructor menu to add the
missing labels.
{% endblocktrans %}