Find yesterday’s, today’s and tomorrow’s date
Python3
# Python program to find yesterday,# today and tomorrow# Import datetime and timedelta# class from datetime modulefrom datetime import datetime, timedelta# Get today's datepresentday = datetime.now() # or presentday = datetime.today()# Get Yesterdayyesterday = presentday - timedelta(1)# Get Tomorrowtomorrow = presentday + timedelta(1)# strftime() is to format date according to# the need by converting them to stringprint("Yesterday = ", yesterday.strftime('%d-%m-%Y'))print("Today = ", presentday.strftime('%d-%m-%Y'))print("Tomorrow = ", tomorrow.strftime('%d-%m-%Y')) |
Yesterday = 10-12-2019 Today = 11-12-2019 Tomorrow = 12-12-2019
Time complexity: O(1)
Auxiliary space: O(1)
Python | Find yesterday’s, today’s and tomorrow’s date
Prerequisites: datetime module
We can handle Data objects by importing the module datetime and timedelta to work with dates.
- datetime module helps to find the present day by using the now() or today() method.
- timedelta class from datetime module helps to find the previous day date and next day date.
Syntax for timedelta:
class datetime.timedelta(days=0, seconds=0, microseconds=0, milliseconds=0, minutes=0, hours=0, weeks=0)
timedelta class is used because manipulating the date directly with increment and decrement will lead to a false Date. For example, if the present date is 31st of December, incrementing the date directly will only lead to the 32nd of December which is false. If we want to manipulate the Date directly first we have check day month and year combined and then increment accordingly. But, all this mess can be controlled by using timedelta class.
Syntax to find a present-day date:
datetime.now() Returns: A datetime object containing the current local date and time.
Syntax to find a previous-day and next-day date:
previous-day = datetime.now()-timedelta(1) next-day = datetime.now()+timedelta(1)
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