New Year's Day
New Year's Day (obs.)
January 2 (obs.)
Coming of Age Day
Foundation Day
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.)
New Year's Eve
  January
  February
  March
  April
  May
  June
  July
  August
  September
  October
  November
  December
 ‹ 1639
1640
1641 › 
# Date Public holiday
1Sunday, 1 January 1640 New Year's Day
Monday, 2 January 1640 New Year's Day (observance)
Tuesday, 3 January 1640 January 2 (observance)
2Monday, 9 January 1640 Coming of Age Day
3Saturday, 11 February 1640 Foundation Day
4Tuesday, 20 March 1640 Vernal Equinox Day
5Sunday, 29 April 1640 Shōwa Day
Monday, 30 April 1640 Shōwa Day (observance)
6Thursday, 3 May 1640 Constitution Memorial Day
7Friday, 4 May 1640 Greenery Day
8Saturday, 5 May 1640 Children's Day
9Monday, 16 July 1640 Marine Day
10Monday, 17 September 1640 Respect-for-Aged Day
11Sunday, 23 September 1640 Autumnal Equinox Day
Monday, 24 September 1640 Autumnal Equinox Day (observance)
12Monday, 8 October 1640 Health and Sports Day
13Saturday, 3 November 1640 Culture Day
14Friday, 23 November 1640 Labor Thanksgiving Day
15Sunday, 23 December 1640 Emperor's Birthday
Monday, 24 December 1640 Emperor's Birthday (observance)
16Monday, 31 December 1640 New Year's Eve