DateTime > Leap year Favorite

Source: https://www.debuggex.com/r/cPHZvaz0KiDV8N7a

Matches a valid leap year between 1000 and 9999.

Sample Matches
Text Result
1200
Group #0
1200
match
1600
Group #0
1600
match
2000
Group #0
2000
match
2104
Group #0
2104
match
9996
Group #0
9996
match
1000no match
1400no match
2007no match
2100no match