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Years with Same Calendar as 1671

The year 1671 had 365 days and started on a Thursday (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 1671
YearCompared to year 1671Since last
157398 years before 
157992 years before+ 6 years
Guinea-Bissau adopted today's Gregorian calendar in 1582. All previous years are based on the Julian calendar.
158784 years before+ 8 years
159873 years before+ 11 years
160962 years before+ 11 years
161556 years before+ 6 years
162645 years before+ 11 years
163734 years before+ 11 years
164328 years before+ 6 years
165417 years before+ 11 years
16656 years before+ 11 years
1671selected year+ 6 years
168211 years after+ 11 years
169322 years after+ 11 years
169928 years after+ 6 years
170534 years after+ 6 years
171140 years after+ 6 years
172251 years after+ 11 years
173362 years after+ 11 years
173968 years after+ 6 years
175079 years after+ 11 years
176190 years after+ 11 years
176796 years after+ 6 years
22 years share the calendar of year 1671 in the 200-year time span from 1571 to 1770.
Note that holidays will not match exactly. Selected year is highlighted.

Extend to 1100 – 2099

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.