Years with Same Calendar as 1646
The year 1646 had 365 days and started on a Segunda-feira (Portugal, 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 1646 | ||
|---|---|---|
| Year | Compared to year 1646 | Since last |
| 1554 | 92 years before | |
| 1565 | 81 years before | + 11 years |
| 1571 | 75 years before | + 6 years |
| Portugal adopted today's Gregorian calendar in 1582. All previous years are based on the Julian calendar. | ||
| 1590 | 56 years before | + 19 years |
| 1601 | 45 years before | + 11 years |
| 1607 | 39 years before | + 6 years |
| 1618 | 28 years before | + 11 years |
| 1629 | 17 years before | + 11 years |
| 1635 | 11 years before | + 6 years |
| 1646 | selected year | + 11 years |
| 1657 | 11 years after | + 11 years |
| 1663 | 17 years after | + 6 years |
| 1674 | 28 years after | + 11 years |
| 1685 | 39 years after | + 11 years |
| 1691 | 45 years after | + 6 years |
| 1703 | 57 years after | + 12 years |
| 1714 | 68 years after | + 11 years |
| 1725 | 79 years after | + 11 years |
| 1731 | 85 years after | + 6 years |
| 1742 | 96 years after | + 11 years | 19 years share the calendar of year 1646 in the 200-year time span from 1546 to 1745. Note that holidays will not match exactly. Selected year is highlighted. |
Which Years Have the Same Calendar?
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Which Months Have the Same Calendar?
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