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Recognised as Decade

1940s

  • 1940-1949
  • 3,653 days
  • 3 leap years
  • 20th century

The 1940s was the decade from 1 January 1940 to 31 December 1949, 3,653 days in total. It contained 3 leap years (1940, 1944, 1948). Counted strictly from year 1 the decade would run 1941 to 1950; this page uses the common reading.

Span of the decade

First day1 January 1940
Last day31 December 1949
Opened on aMonday
Closed on aSaturday
Days in the decade3,653
Weeks in the decade521 and 6 days
Century20th century

The years of the 1940s

1940Leap year, 366 days
1941Common year, 365 days
1942Common year, 365 days
1943Common year, 365 days
1944Leap year, 366 days
1945Common year, 365 days
1946Common year, 365 days
1947Common year, 365 days
1948Leap year, 366 days
1949Common year, 365 days

Leap years

Leap years1940, 1944, 1948
How many3a decade spanning a skipped century leap year has fewer
Common years7

Unix time

Start of the decade-946,771,200seconds since 1 January 1970
End of the decade-631,152,001the last second of 31 December

Where a decade starts

This page uses1940 to 1949the common reading, grouping years by their shared first three digits
The strict ordinal decade1941 to 1950counting in tens from year 1, the 195th decade runs 1941 to 1950
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 “1940s” by Nerdulator’s date engine. Nothing here was retrieved from a database of answers or written by a model.