Years with Same Calendar as 1666
The year 1666 had 365 days and started on a mandag (Norway, Julian calendar).
This country was still using the Julian calendar in year 1666. 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 1700. This affects the selection of years listed here.
| Years with same starting weekday and equal number of days to 1666 | ||
|---|---|---|
| Year | Compared to year 1666 | Since last |
| 1571 | 95 years before | |
| 1582 | 84 years before | + 11 years |
| 1593 | 73 years before | + 11 years |
| 1599 | 67 years before | + 6 years |
| 1610 | 56 years before | + 11 years |
| 1621 | 45 years before | + 11 years |
| 1627 | 39 years before | + 6 years |
| 1638 | 28 years before | + 11 years |
| 1649 | 17 years before | + 11 years |
| 1655 | 11 years before | + 6 years |
| 1666 | selected year | + 11 years |
| 1677 | 11 years after | + 11 years |
| 1683 | 17 years after | + 6 years |
| 1694 | 28 years after | + 11 years |
| Norway adopted today's Gregorian calendar in 1700. All previous years are based on the Julian calendar. | ||
| 1703 | 37 years after | + 9 years |
| 1714 | 48 years after | + 11 years |
| 1725 | 59 years after | + 11 years |
| 1731 | 65 years after | + 6 years |
| 1742 | 76 years after | + 11 years |
| 1753 | 87 years after | + 11 years |
| 1759 | 93 years after | + 6 years | 20 years share the calendar of year 1666 in the 200-year time span from 1566 to 1765. Note that holidays will not match exactly. Selected year is highlighted. |
Which Years Have the Same Calendar?
Reuse your yearly calendar by finding years that have the same number of days and start on the same day of the week.
Which Months Have the Same Calendar?
Find months that have the same number of days and start on the same day of the week.
When Does a Date Fall on a Certain Weekday?
Do you feel dates like Friday the 13th occur often? This calculator tells you exactly when.