Modern Python Standard Library Cookbook

How to do it...

For this recipe, here are the steps:

1. The shiftdate function will allow us to move to a date by any number of days:

import datetime

def shiftdate(d, days):
    return (
        d.replace(hour=0, minute=0, second=0, microsecond=0) + 
        datetime.timedelta(days=days)
    )

2. Using it is as simple as just providing the days you want to add or remove:

>>> now = datetime.datetime.utcnow()
>>> now
datetime.datetime(2018, 3, 21, 21, 55, 5, 699400)

3. We can use it to go to tomorrow:

>>> shiftdate(now, 1)
datetime.datetime(2018, 3, 22, 0, 0)

4. Or to go to yesterday:

>>> shiftdate(now, -1)
datetime.datetime(2018, 3, 20, 0, 0)

5. Or even to go into the next month:

>>> shiftdate(now, 11)
datetime.datetime(2018, 4, 1, 0, 0)