New Year's Day
Coming of Age Day
Foundation Day
Vernal Equinox Day
Emperor's Birthday
Constitution Memorial Day
Children's Day
Respect-for-Aged Day
Autumnal Equinox Day
Health and Sports Day
Culture Day
Labor Thanksgiving Day
Labor Thanksgiving Day (obs.)
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 ‹ 1979
1980
1981 › 
# Date Public holiday
1Tuesday, 1 January 1980 New Year's Day
2Tuesday, 15 January 1980 Coming of Age Day
3Monday, 11 February 1980 Foundation Day
4Thursday, 20 March 1980 Vernal Equinox Day
5Tuesday, 29 April 1980 Emperor's Birthday
6Saturday, 3 May 1980 Constitution Memorial Day
7Monday, 5 May 1980 Children's Day
8Monday, 15 September 1980 Respect-for-Aged Day
9Tuesday, 23 September 1980 Autumnal Equinox Day
10Friday, 10 October 1980 Health and Sports Day
11Monday, 3 November 1980 Culture Day
12Sunday, 23 November 1980 Labor Thanksgiving Day
Monday, 24 November 1980 Labor Thanksgiving Day (observance)