Years with Same Calendar as 640
The year 640 had 366 days and started on a Cumartesi (Turkey, Julian calendar).
This country was still using the Julian calendar in 640. In that calendar system, a Leap Day was added every four years, without the exceptions defined in today's Gregorian calendar. The Gregorian calendar was introduced in 1926.
| Years with same starting weekday and equal number of days to 640 | ||
|---|---|---|
| Year | Compared to year 640 | Since last |
| 556 | 84 years before | |
| 584 | 56 years before | + 28 years |
| 612 | 28 years before | + 28 years |
| 640 | selected year | + 28 years |
| 668 | 28 years after | + 28 years |
| 696 | 56 years after | + 28 years |
| 724 | 84 years after | + 28 years | 6 years share the calendar of year 640 in the 200-year time span from 540 to 739. Note that holidays will not match exactly. Selected year is highlighted. |
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