Dates

add_hour: See also
add_day: See also
add_month: Adds a month to a date. The value must be of the form {{Y,M,D},{H,I,S}} .
add_week: Adds a week to a date. The value must be of the form {{Y,M,D},{H,I,S}} .
add_year: Adds a year to a date. The value must be of the form {{Y,M,D},{H,I,S}} .
date: See also
date_range: See also
datediff: See also
eq_day: See also
in_future: See also
in_past: See also
ne_day: See also
sub_hour: See also
sub_day: See also
sub_month: See also
sub_week: See also
sub_year: See also
timesince: See also
utc: See also