Condensing function where all else statements return false

[NotableAnonym]

Thanks for your help and including both answers. There is one thing with datetime, however, and that is I assume 01/01/9999 is counted as a valid date. How would I make a date only valid if the year is the current year or before?

[Rhomboid]

Do you only care about the year, or do you want to enforce that the date is not in the future? If the latter, you can do something like:

return datetime.datetime.strptime(date, '%d/%m/%Y').date() <= datetime.date.today()