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Years with Same Calendar as 660 – Extended Range

The year 660 had 366 days and started on a Çarşamba (Turkey, Julian calendar).

This country was still using the Julian calendar in 660. 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 1926.

Years with same starting weekday and equal number of days to 660
YearCompared to year 660Since last
100560 years before 
128532 years before+ 28 years
156504 years before+ 28 years
184476 years before+ 28 years
212448 years before+ 28 years
240420 years before+ 28 years
268392 years before+ 28 years
296364 years before+ 28 years
324336 years before+ 28 years
352308 years before+ 28 years
380280 years before+ 28 years
408252 years before+ 28 years
436224 years before+ 28 years
464196 years before+ 28 years
492168 years before+ 28 years
520140 years before+ 28 years
548112 years before+ 28 years
57684 years before+ 28 years
60456 years before+ 28 years
63228 years before+ 28 years
660selected year+ 28 years
68828 years after+ 28 years
71656 years after+ 28 years
74484 years after+ 28 years
772112 years after+ 28 years
800140 years after+ 28 years
828168 years after+ 28 years
856196 years after+ 28 years
884224 years after+ 28 years
912252 years after+ 28 years
940280 years after+ 28 years
968308 years after+ 28 years
996336 years after+ 28 years
1024364 years after+ 28 years
1052392 years after+ 28 years
1080420 years after+ 28 years
35 years share the calendar of year 660 in the 1000-year time span from 100 to 1099.
Note that holidays will not match exactly. Selected year is highlighted.

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