Date

Note

Check dateutil before using these snippets… (although using Combine to set the time to the start or end of the day is very clever)!

Adding

To add one day to the current date:

import datetime
d = datetime.datetime.today()
one_day = datetime.timedelta(days=1)
d = d + one_day

To add one month is a little awkward e.g:

# Copied from:
# http://code.activestate.com/recipes/577274-subtract-or-add-a-month-to-a-datetimedate-or-datet/
# For finding the next month's first you advance to the next month. By adding
# 32 days from the first of a month you will always reach the next month.
def add_one_month(dt0):
    dt1 = dt0.replace(day=1)
    dt2 = dt1 + datetime.timedelta(days=32)
    dt3 = dt2.replace(day=1)
    return dt3

Combine

To set the time to the start or end of the day (from How to get the first and last second in python using datetime module)

from datetime import datetime, time

from_date = datetime.combine(from_date.date(), time.min)
to_date = datetime.combine(to_date.date(), time.max)

return datetime.combine(self.start_date, self.start_time)

Info

Next Monday

today = datetime.date.today()
next_monday = today + datetime.timedelta(days=-today.weekday(), weeks=1)

Last Day of Month

Get last day of the month

today = datetime.datetime.today()
first_last_day = calendar.monthrange(today.year, today.month)
return datetime.datetime(today.year, today.month, first_last_day[1])

Tidy

To remove the time from a datetime value:

>>> import datetime
>>> d = datetime.datetime.today()
>>> d
datetime.datetime(2011, 7, 18, 10, 55, 25, 598169)
>>> d.date()
datetime.date(2011, 7, 18)