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| Conditions | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 |
|---|---|---|---|---|---|---|---|---|
| 1. Divisible by 4 | Y | Y | Y | Y | N | N | N | N |
| 2. Divisible by 100 | Y | Y | N | N | Y | Y | N | N |
| 3. Divisible by 400 | Y | N | Y | N | Y | N | Y | N |
| Actions | ||||||||
| 1. Leap Year | X | X | ||||||
| 2. Not Leap Year | X | X | ||||||
| 3. Impossible | X | X | X | X |
Applications which manipulate time and date values may need to include an algorithm to decide whether a given year is a Leap Year.