New Year's Day
January 2
New Year's Day (obs.)
January 2 (obs.)
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
New Year's Eve
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 ‹ 1677
1678
1679 › 
# Date Public holiday
1Saturday, 1 January 1678 New Year's Day
2Sunday, 2 January 1678 January 2
Monday, 3 January 1678 New Year's Day (observance)
Tuesday, 4 January 1678 January 2 (observance)
3Monday, 10 January 1678 Coming of Age Day
4Friday, 11 February 1678 Foundation Day
5Sunday, 20 March 1678 Vernal Equinox Day
6Friday, 29 April 1678 Shōwa Day
7Tuesday, 3 May 1678 Constitution Memorial Day
8Wednesday, 4 May 1678 Greenery Day
9Thursday, 5 May 1678 Children's Day
10Monday, 18 July 1678 Marine Day
11Monday, 19 September 1678 Respect-for-Aged Day
12Friday, 23 September 1678 Autumnal Equinox Day
13Monday, 10 October 1678 Health and Sports Day
14Thursday, 3 November 1678 Culture Day
15Wednesday, 23 November 1678 Labor Thanksgiving Day
16Friday, 23 December 1678 Emperor's Birthday
17Saturday, 31 December 1678 New Year's Eve