To check date Validity

The program checks whether a date entered in DD/MM/YYYY format is a valid one or not.

Test for Leap Year Corrections Made:

Pseudocode to determine whether a year is a leap year or not:

if year is divisible by 400 then is_leap_year
else if year is divisible by 100 then not_leap_year
else if year is divisible by 4 then is_leap_year
else not_leap_year