Valid dates

Write a function that tells if the date defined by a day @d@, month @m@ and year @y@ is valid or not.

Interface

C++	`bool is_valid_date(int d, int m, int y);`
C	`int is_valid_date(int d, int m, int y);`
Java	`public static boolean isValidDate(int d, int m, int y);`
Python	`is_valid_date(d, m, y) # returns bool`
	`is_valid_date(d: int, m: int, y: int) -> bool`

To write this function, it is convinient to use the function for leap years of the exercise problem://problemsjutge.org:problems/p1/jpetit/traspas-funcio.pbm.

The parameter @y@ is between 1800 and 9999, both included.

You only need to submit the required procedure; your main program will be ignored.

Author: Unknown
Translator: Salvador Roura

Generation: 2026-01-25T11:30:39.343Z