Python Program to Check if a Date is Valid or not

In this example, we will write a python program to take input date from the user and display whether it is valid or not. To better understand this example, make sure you have knowledge of the following tutorials:-

• • Python Operators
  • Python Input and Output

Let us have basic information about the valid dates:-

Python Program to Check if a Date is Valid or not

year = int(input("Enter year: "))
month = int(input("Enter month: "))
day = int(input("Enter day: "))

# Get Max value for a day in given month
if month == 1 or month == 3 or month == 5 or month == 7 or month == 8 or month == 10 or month == 12:
    max_day_value = 31
elif month == 4 or month == 6 or month == 9 or month == 11:
    max_day_value = 30
elif year % 4 == 0 and year % 100 != 0 or year % 400 == 0:
    max_day_value = 29
else:
    max_day_value = 28

if month < 1 or month > 12:
    print("Date is invalid.")
elif day < 1 or day > max_day_value:
    print("Date is invalid.")
else:
    print("Valid Date")

The output of the above program is:-