Years with Same Calendar as 1665

Year: Country:

The year 1665 had 365 days and started on a Thursday (Peru, 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 1665
Year	Compared to year 1665	Since last
1573	92 years before
1579	86 years before	+ 6 years
Peru adopted today's Gregorian calendar in 1582. All previous years are based on the Julian calendar.
1587	78 years before	+ 8 years
1598	67 years before	+ 11 years
1609	56 years before	+ 11 years
1615	50 years before	+ 6 years
1626	39 years before	+ 11 years
1637	28 years before	+ 11 years
1643	22 years before	+ 6 years
1654	11 years before	+ 11 years
1665	selected year	+ 11 years
1671	6 years after	+ 6 years
1682	17 years after	+ 11 years
1693	28 years after	+ 11 years
1699	34 years after	+ 6 years
1705	40 years after	+ 6 years
1711	46 years after	+ 6 years
1722	57 years after	+ 11 years
1733	68 years after	+ 11 years
1739	74 years after	+ 6 years
1750	85 years after	+ 11 years
1761	96 years after	+ 11 years
21 years share the calendar of year 1665 in the 200-year time span from 1565 to 1764. Note that holidays will not match exactly. Selected year is highlighted.

Extend to 1100 – 2099

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