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
 ‹ 1839
1840
1841 › 
# Date Public holiday
1Wednesday, 1 January 1840 New Year's Day
2Monday, 13 January 1840 Coming of Age Day
3Tuesday, 11 February 1840 Foundation Day
4Friday, 20 March 1840 Vernal Equinox Day
5Wednesday, 29 April 1840 Shōwa Day
6Sunday, 3 May 1840 Constitution Memorial Day
7Monday, 4 May 1840 Greenery Day
8Tuesday, 5 May 1840 Children's Day
9Monday, 20 July 1840 Marine Day
10Monday, 21 September 1840 Respect-for-Aged Day
11Wednesday, 23 September 1840 Autumnal Equinox Day
12Monday, 12 October 1840 Health and Sports Day
13Tuesday, 3 November 1840 Culture Day
14Monday, 23 November 1840 Labor Thanksgiving Day
15Wednesday, 23 December 1840 Emperor's Birthday