Program to check if a date is valid or not

Given a date, check if it is valid or not. It may be assumed that the given date is in range from 01/01/1800 to 31/12/9999.

Examples :  

Input : d = 10, m = 12, y = 2000
Output : Yes
The given date 10/12/2000 is valid

Input : d = 30, m = 2, y = 2000
Output : No
The given date 30/2/2000 is invalid. The
February month cannot have 30 as day.

The idea is simple. We need to handle following things. 
1) y, m and d are in allowed range. 
2) Days in February are in allowed range and leap year is handled. 
3) Days in 30 day months are handled.

Below is the implementation to check if a given year is valid or not. 

Output : 

Yes
No

Time Complexity: O(1)
Auxiliary Space: O(1), since no extra space has been taken.