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Recognised as Decade

1210s

  • 1210-1219
  • 3,652 days
  • 2 leap years
  • 13th century

The 1210s was the decade from 1 January 1210 to 31 December 1219, 3,652 days in total. It contained 2 leap years (1212, 1216). Counted strictly from year 1 the decade would run 1211 to 1220; this page uses the common reading.

Span of the decade

First day1 January 1210
Last day31 December 1219
Opened on aFriday
Closed on aTuesday
Days in the decade3,652
Weeks in the decade521 and 5 days
Century13th century

The years of the 1210s

1210Common year, 365 days
1211Common year, 365 days
1212Leap year, 366 days
1213Common year, 365 days
1214Common year, 365 days
1215Common year, 365 days
1216Leap year, 366 days
1217Common year, 365 days
1218Common year, 365 days
1219Common year, 365 days

Leap years

Leap years1212, 1216
How many2the usual count for a decade
Common years8

Unix time

Start of the decade-23,983,257,600seconds since 1 January 1970
End of the decade-23,667,724,801the last second of 31 December

Where a decade starts

This page uses1210 to 1219the common reading, grouping years by their shared first three digits
The strict ordinal decade1211 to 1220counting in tens from year 1, the 122nd decade runs 1211 to 1220
Which is correctBoth, for different questionsthe first is a naming convention, the second follows from counting; neither is derived from the other

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Every value on this page was computed from “1210s” by Nerdulator’s date engine. Nothing here was retrieved from a database of answers or written by a model.