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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 ‹ 1977
1978
1979 › 
# Date Public holiday
1Sunday, 1 January 1978 New Year's Day
Monday, 2 January 1978 New Year's Day (observance)
2Monday, 9 January 1978 Coming of Age Day
3Saturday, 11 February 1978 Foundation Day
4Monday, 20 March 1978 Vernal Equinox Day
5Saturday, 29 April 1978 Shōwa Day
6Wednesday, 3 May 1978 Constitution Memorial Day
7Thursday, 4 May 1978 Greenery Day
8Friday, 5 May 1978 Children's Day
9Monday, 17 July 1978 Marine Day
10Monday, 18 September 1978 Respect-for-Aged Day
11Saturday, 23 September 1978 Autumnal Equinox Day
12Monday, 9 October 1978 Health and Sports Day
13Friday, 3 November 1978 Culture Day
14Thursday, 23 November 1978 Labor Thanksgiving Day
15Saturday, 23 December 1978 Emperor's Birthday