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