New Year's Day
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.)
  January
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  March
  April
  May
  June
  July
  August
  September
  October
  November
  December
 ‹ 1865
1866
1867 › 
# Date Public holiday
1Monday, 1 January 1866 New Year's Day
2Monday, 8 January 1866 Coming of Age Day
3Sunday, 11 February 1866 Foundation Day
Monday, 12 February 1866 Foundation Day (observance)
4Tuesday, 20 March 1866 Vernal Equinox Day
5Sunday, 29 April 1866 Shōwa Day
Monday, 30 April 1866 Shōwa Day (observance)
6Thursday, 3 May 1866 Constitution Memorial Day
7Friday, 4 May 1866 Greenery Day
8Saturday, 5 May 1866 Children's Day
9Monday, 16 July 1866 Marine Day
10Monday, 17 September 1866 Respect-for-Aged Day
11Sunday, 23 September 1866 Autumnal Equinox Day
Monday, 24 September 1866 Autumnal Equinox Day (observance)
12Monday, 8 October 1866 Health and Sports Day
13Saturday, 3 November 1866 Culture Day
14Friday, 23 November 1866 Labor Thanksgiving Day
15Sunday, 23 December 1866 Emperor's Birthday
Monday, 24 December 1866 Emperor's Birthday (observance)