New Year's Day
January 2
January 3
Coming of Age Day
Foundation Day
Foundation Day (obs.)
Vernal Equinox Day
Shōwa Day
Shōwa Day (obs.)
Constitution Memorial Day
Greenery Day
Children's Day
Marine Day
Respect-for-Aged Day
Autumnal Equinox Day
Autumnal Equinox Day (obs.)
Health and Sports Day
Culture Day
Labor Thanksgiving Day
Emperor's Birthday
Emperor's Birthday (obs.)
New Year's Eve
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 ‹ 1989
1990
1991 › 
# Date Public holiday
1Monday, 1 January 1990 New Year's Day
2Tuesday, 2 January 1990 January 2
3Wednesday, 3 January 1990 January 3
4Monday, 8 January 1990 Coming of Age Day
5Sunday, 11 February 1990 Foundation Day
Monday, 12 February 1990 Foundation Day (observance)
6Tuesday, 20 March 1990 Vernal Equinox Day
7Sunday, 29 April 1990 Shōwa Day
Monday, 30 April 1990 Shōwa Day (observance)
8Thursday, 3 May 1990 Constitution Memorial Day
9Friday, 4 May 1990 Greenery Day
10Saturday, 5 May 1990 Children's Day
11Monday, 16 July 1990 Marine Day
12Monday, 17 September 1990 Respect-for-Aged Day
13Sunday, 23 September 1990 Autumnal Equinox Day
Monday, 24 September 1990 Autumnal Equinox Day (observance)
14Monday, 8 October 1990 Health and Sports Day
15Saturday, 3 November 1990 Culture Day
16Friday, 23 November 1990 Labor Thanksgiving Day
17Sunday, 23 December 1990 Emperor's Birthday
Monday, 24 December 1990 Emperor's Birthday (observance)
18Monday, 31 December 1990 New Year's Eve