Years with Same Calendar as 1621
The year 1621 had 365 days and started on a Friday (Guinea-Bissau, Gregorian calendar).
This country introduced the modern Gregorian calendar in year 1582, so previous years are based on the Julian calendar. In that calendar system, a Leap Day was added every four years, without the exceptions defined in today's Gregorian calendar. This affects the selection of years listed here.
| Years with same starting weekday and equal number of days to 1621 | ||
|---|---|---|
| Year | Compared to year 1621 | Since last |
| 1529 | 92 years before | |
| 1535 | 86 years before | + 6 years |
| 1546 | 75 years before | + 11 years |
| 1557 | 64 years before | + 11 years |
| 1563 | 58 years before | + 6 years |
| 1574 | 47 years before | + 11 years |
| Guinea-Bissau adopted today's Gregorian calendar in 1582. All previous years are based on the Julian calendar. | ||
| 1593 | 28 years before | + 19 years |
| 1599 | 22 years before | + 6 years |
| 1610 | 11 years before | + 11 years |
| 1621 | selected year | + 11 years |
| 1627 | 6 years after | + 6 years |
| 1638 | 17 years after | + 11 years |
| 1649 | 28 years after | + 11 years |
| 1655 | 34 years after | + 6 years |
| 1666 | 45 years after | + 11 years |
| 1677 | 56 years after | + 11 years |
| 1683 | 62 years after | + 6 years |
| 1694 | 73 years after | + 11 years |
| 1700 | 79 years after | + 6 years |
| 1706 | 85 years after | + 6 years |
| 1717 | 96 years after | + 11 years |
20 years share the calendar of year 1621 in the 200-year time span from 1521 to 1720.
Note that holidays will not match exactly. Selected year is highlighted.
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