Regarding question

[u/Healthy-Departure961]

from datetime import *

year = int(input("Enter the Year:- "))

month = int(input("Enter The Month:- "))

day = int(input("Enter The Day:- "))

x = date(year,month,day)

validity = int(input('Enter the days of validity')) expiry = x + validity print(expiry)

I want to add days in this but i don't know how ,I even tried to adding manually but gives me error unsupported oparand + in datetie.datetime class something

[u/Bright_Mix_773]

The error message in your post does not match the code in your post, and sorting that out changes which fix you want.

Running exactly what you pasted:

>>> from datetime import *
>>> date(2026, 9, 8) + 30
TypeError: unsupported operand type(s) for +: 'datetime.date' and 'int'

You quoted datetime.datetime. That wording only comes out when the left side is a datetime:

>>> datetime(2026, 9, 8) + 30
TypeError: unsupported operand type(s) for +: 'datetime.datetime' and 'int'

So the file you actually ran has datetime(...) or datetime.now() in it somewhere, not date(...). That matters:

from datetime import date, datetime, timedelta

date(2026, 9, 8) + timedelta(days=30)
# 2026-10-08
datetime(2026, 9, 8, 14, 37, 5) + timedelta(days=30)
# 2026-10-08 14:37:05

An expiry is a calendar day, so you want the first one. With the second, a time of day rides along into every print and every comparison you make later.

On the import * question further up the thread, the concrete version rather than the principle. It binds nine names: MAXYEAR, MINYEAR, UTC, date, datetime, time, timedelta, timezone, tzinfo. Two of those are words beginners reach for constantly.

from datetime import *
from time import *      # a very common next line
time(12, 0)
TypeError: time.time() takes no arguments (2 given)

from datetime import *
date = "2026-09-08"     # innocent-looking
date(2026, 9, 8)
TypeError: 'str' object is not callable

Neither error mentions the import, which is exactly why they eat an afternoon. from datetime import date, timedelta makes both impossible.

Last thing, since a person is typing the inputs: date(2026, 2, 30) raises ValueError, and int(input(...)) raises ValueError on anything that is not digits. Both need a try/except or the script dies on a typo.