New Year's Day
January 2
January 3
Coming of Age Day
Foundation Day
Foundation Day (obs.)
Vernal Equinox Day
Shōwa Day
Constitution Memorial Day
Greenery Day
Children's Day
Children's Day (obs.)
Marine Day
Respect-for-Aged Day
Autumnal Equinox Day
Health and Sports Day
Culture Day
Culture Day (obs.)
Labor Thanksgiving Day
Emperor's Birthday
New Year's Eve
  January
  February
  March
  April
  May
  June
  July
  August
  September
  October
  November
  December
 ‹ 1679
1680
1681 › 
# Date Public holiday
1Monday, 1 January 1680 New Year's Day
2Tuesday, 2 January 1680 January 2
3Wednesday, 3 January 1680 January 3
4Monday, 8 January 1680 Coming of Age Day
5Sunday, 11 February 1680 Foundation Day
Monday, 12 February 1680 Foundation Day (observance)
6Wednesday, 20 March 1680 Vernal Equinox Day
7Monday, 29 April 1680 Shōwa Day
8Friday, 3 May 1680 Constitution Memorial Day
9Saturday, 4 May 1680 Greenery Day
10Sunday, 5 May 1680 Children's Day
Monday, 6 May 1680 Children's Day (observance)
11Monday, 15 July 1680 Marine Day
12Monday, 16 September 1680 Respect-for-Aged Day
13Monday, 23 September 1680 Autumnal Equinox Day
14Monday, 14 October 1680 Health and Sports Day
15Sunday, 3 November 1680 Culture Day
Monday, 4 November 1680 Culture Day (observance)
16Saturday, 23 November 1680 Labor Thanksgiving Day
17Monday, 23 December 1680 Emperor's Birthday
18Tuesday, 31 December 1680 New Year's Eve