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Years with Same Calendar as 840

The year 840 had 366 days and started on a Thursday (United States, Julian calendar).

This country was still using the Julian calendar in 840. 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 1752.

Years with same starting weekday and equal number of days to 840
YearCompared to year 840Since last
75684 years before 
78456 years before+ 28 years
81228 years before+ 28 years
840selected year+ 28 years
86828 years after+ 28 years
89656 years after+ 28 years
92484 years after+ 28 years
6 years share the calendar of year 840 in the 200-year time span from 740 to 939.
Note that holidays will not match exactly. Selected year is highlighted.

Extend to 300 – 1299


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