Years with Same Calendar as 1661

Year: Country:

The year 1661 had 365 days and started on a Saturday (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 1661
Year	Compared to year 1661	Since last
1569	92 years before
1575	86 years before	+ 6 years
Guinea-Bissau adopted today's Gregorian calendar in 1582. All previous years are based on the Julian calendar.
1583	78 years before	+ 8 years
1594	67 years before	+ 11 years
1605	56 years before	+ 11 years
1611	50 years before	+ 6 years
1622	39 years before	+ 11 years
1633	28 years before	+ 11 years
1639	22 years before	+ 6 years
1650	11 years before	+ 11 years
1661	selected year	+ 11 years
1667	6 years after	+ 6 years
1678	17 years after	+ 11 years
1689	28 years after	+ 11 years
1695	34 years after	+ 6 years
1701	40 years after	+ 6 years
1707	46 years after	+ 6 years
1718	57 years after	+ 11 years
1729	68 years after	+ 11 years
1735	74 years after	+ 6 years
1746	85 years after	+ 11 years
1757	96 years after	+ 11 years
21 years share the calendar of year 1661 in the 200-year time span from 1561 to 1760. Note that holidays will not match exactly. Selected year is highlighted.

Extend to 1100 – 2099

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