days_between
Counts the whole days from the value to the argument, positive when the argument is the later of the two and negative when it is earlier, so `{{ now | days_between:expires_at }}` is how many days are left.
It answers with a number, which is what makes the question a template
actually asks reachable. An argument is a name or a literal and never a pipe,
so a date shifted by a modifier cannot itself be compared against, and
"expiring within a fortnight" has to be written as a count instead of as two
dates: {{ now | days_between:expires_at | lte:14 }}. The same number is what
a notice reads out, "expires in 12 days".
Both sides are read as calendar days in UTC, so a date and a timestamp on the same day are zero days apart however far into the day the timestamp sits, and midnight tonight is one day away rather than a fraction of one.
time.Timetime.TimeintCounts the days left, the number a notice reads out.
Given
{"today": moment, "expires_at": time.Date(2024, 3, 26, 0, 0, 0, 0, time.UTC)}Template
expires in {{ today | days_between:expires_at }} daysResult
expires in 12 days