Years with Same Calendar as 1780 – Extended Range
The year 1780 had 366 days and started on a lørdag (Denmark, Gregorian calendar).
This country introduced the modern Gregorian calendar in year 1700, 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 1780 | ||
|---|---|---|
| Year | Compared to year 1780 | Since last |
| 1200 | 580 years before | |
| 1228 | 552 years before | + 28 years |
| 1256 | 524 years before | + 28 years |
| 1284 | 496 years before | + 28 years |
| 1312 | 468 years before | + 28 years |
| 1340 | 440 years before | + 28 years |
| 1368 | 412 years before | + 28 years |
| 1396 | 384 years before | + 28 years |
| 1424 | 356 years before | + 28 years |
| 1452 | 328 years before | + 28 years |
| 1480 | 300 years before | + 28 years |
| 1508 | 272 years before | + 28 years |
| 1536 | 244 years before | + 28 years |
| 1564 | 216 years before | + 28 years |
| 1592 | 188 years before | + 28 years |
| 1620 | 160 years before | + 28 years |
| 1648 | 132 years before | + 28 years |
| 1676 | 104 years before | + 28 years |
| Denmark adopted today's Gregorian calendar in 1700. All previous years are based on the Julian calendar. | ||
| 1724 | 56 years before | + 48 years |
| 1752 | 28 years before | + 28 years |
| 1780 | selected year | + 28 years |
| 1820 | 40 years after | + 40 years |
| 1848 | 68 years after | + 28 years |
| 1876 | 96 years after | + 28 years |
| 1916 | 136 years after | + 40 years |
| 1944 | 164 years after | + 28 years |
| 1972 | 192 years after | + 28 years |
| 2000 | 220 years after | + 28 years |
| 2028 | 248 years after | + 28 years |
| 2056 | 276 years after | + 28 years |
| 2084 | 304 years after | + 28 years |
| 2124 | 344 years after | + 40 years |
| 2152 | 372 years after | + 28 years |
| 2180 | 400 years after | + 28 years | 33 years share the calendar of year 1780 in the 1000-year time span from 1200 to 2199. Note that holidays will not match exactly. Selected year is highlighted. |
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