New Year's Day
New Year's Day (obs.)
January 2 (obs.)
Coming of Age Day
Foundation Day
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
  January
  February
  March
  April
  May
  June
  July
  August
  September
  October
  November
  December
 ‹ 1803
1804
1805 › 
# Date Public holiday
1Sunday, 1 January 1804 New Year's Day
Monday, 2 January 1804 New Year's Day (observance)
Tuesday, 3 January 1804 January 2 (observance)
2Monday, 9 January 1804 Coming of Age Day
3Saturday, 11 February 1804 Foundation Day
4Tuesday, 20 March 1804 Vernal Equinox Day
5Sunday, 29 April 1804 Shōwa Day
Monday, 30 April 1804 Shōwa Day (observance)
6Thursday, 3 May 1804 Constitution Memorial Day
7Friday, 4 May 1804 Greenery Day
8Saturday, 5 May 1804 Children's Day
9Monday, 16 July 1804 Marine Day
10Monday, 17 September 1804 Respect-for-Aged Day
11Sunday, 23 September 1804 Autumnal Equinox Day
Monday, 24 September 1804 Autumnal Equinox Day (observance)
12Monday, 8 October 1804 Health and Sports Day
13Saturday, 3 November 1804 Culture Day
14Friday, 23 November 1804 Labor Thanksgiving Day
15Sunday, 23 December 1804 Emperor's Birthday
Monday, 24 December 1804 Emperor's Birthday (observance)
16Monday, 31 December 1804 New Year's Eve