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Recognised as Decade

1120s

  • 1120-1129
  • 3,653 days
  • 3 leap years
  • 12th century

The 1120s was the decade from 1 January 1120 to 31 December 1129, 3,653 days in total. It contained 3 leap years (1120, 1124, 1128). Counted strictly from year 1 the decade would run 1121 to 1130; this page uses the common reading.

Span of the decade

First day1 January 1120
Last day31 December 1129
Opened on aThursday
Closed on aTuesday
Days in the decade3,653
Weeks in the decade521 and 6 days
Century12th century

The years of the 1120s

1120Leap year, 366 days
1121Common year, 365 days
1122Common year, 365 days
1123Common year, 365 days
1124Leap year, 366 days
1125Common year, 365 days
1126Common year, 365 days
1127Common year, 365 days
1128Leap year, 366 days
1129Common year, 365 days

Leap years

Leap years1120, 1124, 1128
How many3a decade spanning a skipped century leap year has fewer
Common years7

Unix time

Start of the decade-26,823,484,800seconds since 1 January 1970
End of the decade-26,507,865,601the last second of 31 December

Where a decade starts

This page uses1120 to 1129the common reading, grouping years by their shared first three digits
The strict ordinal decade1121 to 1130counting in tens from year 1, the 113th decade runs 1121 to 1130
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 “1120s” by Nerdulator’s date engine. Nothing here was retrieved from a database of answers or written by a model.