Recognised as Decade
1980s
- 1980-1989
- 3,653 days
- 3 leap years
- 20th century
The 1980s was the decade from 1 January 1980 to 31 December 1989, 3,653 days in total. It contained 3 leap years (1980, 1984, 1988). Counted strictly from year 1 the decade would run 1981 to 1990; this page uses the common reading.
Span of the decade
First day1 January 1980
Last day31 December 1989
Opened on aTuesday
Closed on aSunday
Days in the decade3,653
Weeks in the decade521 and 6 days
Century20th century
The years of the 1980s
Leap years
Leap years1980, 1984, 1988
How many3a decade spanning a skipped century leap year has fewer
Common years7
Unix time
Start of the decade315,532,800seconds since 1 January 1970
End of the decade631,151,999the last second of 31 December
Where a decade starts
This page uses1980 to 1989the common reading, grouping years by their shared first three digits
The strict ordinal decade1981 to 1990counting in tens from year 1, the 199th decade runs 1981 to 1990
Which is correctBoth, for different questionsthe first is a naming convention, the second follows from counting; neither is derived from the other
Keep nerding
Every link below is a page Nerdulator can generate from what it already knows about this value.
Nerdulate something else
Nothing in mind? Surprise me · today’s page