Japan's National Holidays in 2007 Date Holiday 1 Jan New Year's Holiday 8 Jan Coming of Age Day (the second Monday in January) 11 Feb National Foundation Day 12 Mon. Substitution (National Foundation Day) 21 Mar Vernal Equinox Day (around) 29 Apr Showa Day 30 Apr Substituion (Showa Day) 3 May Constitution Day 4 May Greenery Day 5 May Children's Day 16 Jul Marine Day(the third Monday in July) 17 Sep Respect-for-the-Aged Day(the third Monday in September) 24 Sep Autumnal Equinox Day (around) (Substitution) 8 Oct Health and Sports Day (the second Monday in October) 3 Nov Culture Day 23 Nov Labor Thanksgiving Day 23 Dec Emperor's Birthday 24 Dec Substituion (Emperor's Birthday) [Note] When a National Holiday falls on a Sunday, the following Monday becomes a holiday. Source: http://www.th.emb-japan.go.jp/en/embassy/national.htm