| 1 | Why do we have a leap year? | |
| 2 | Don't forget about the adjustment for leap years when using this trick. | |
| 3 | Today we celebrate the Leap Year, the extra day at the end of February that comes around once every four years. | |
| 4 | Years that are divisible by 100 are not leap years, unless they're also divisible by 400. | |
| 5 | But century years divisible by 400, like 2000, would be leap years. |
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