New Year's Day
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
  May
  June
  July
  August
  September
  October
  November
  December
 ‹ 1665
1666
1667 › 
# Date Public holiday
1Friday, 1 January 1666 New Year's Day
2Monday, 11 January 1666 Coming of Age Day
3Thursday, 11 February 1666 Foundation Day
4Saturday, 20 March 1666 Vernal Equinox Day
5Thursday, 29 April 1666 Shōwa Day
6Monday, 3 May 1666 Constitution Memorial Day
7Tuesday, 4 May 1666 Greenery Day
8Wednesday, 5 May 1666 Children's Day
9Monday, 19 July 1666 Marine Day
10Monday, 20 September 1666 Respect-for-Aged Day
11Thursday, 23 September 1666 Autumnal Equinox Day
12Monday, 11 October 1666 Health and Sports Day
13Wednesday, 3 November 1666 Culture Day
14Tuesday, 23 November 1666 Labor Thanksgiving Day
15Thursday, 23 December 1666 Emperor's Birthday