New Year's Day
New Year's Day (obs.)
Coming of Age Day
Foundation Day
Vernal Equinox Day
Shōwa Day
Constitution Memorial Day
Greenery Day
Children's Day
Marine Day
Respect-for-Aged Day
Autumnal Equinox Day
Health and Sports Day
Culture Day
Labor Thanksgiving Day
Emperor's Birthday
  January
  February
  March
  April
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  June
  July
  August
  September
  October
  November
  December
 ‹ 1779
1780
1781 › 
# Date Public holiday
1Saturday, 1 January 1780 New Year's Day
Monday, 3 January 1780 New Year's Day (observance)
2Monday, 10 January 1780 Coming of Age Day
3Friday, 11 February 1780 Foundation Day
4Monday, 20 March 1780 Vernal Equinox Day
5Saturday, 29 April 1780 Shōwa Day
6Wednesday, 3 May 1780 Constitution Memorial Day
7Thursday, 4 May 1780 Greenery Day
8Friday, 5 May 1780 Children's Day
9Monday, 17 July 1780 Marine Day
10Monday, 18 September 1780 Respect-for-Aged Day
11Saturday, 23 September 1780 Autumnal Equinox Day
12Monday, 9 October 1780 Health and Sports Day
13Friday, 3 November 1780 Culture Day
14Thursday, 23 November 1780 Labor Thanksgiving Day
15Saturday, 23 December 1780 Emperor's Birthday