Embassy's Holidays in 2005 3 January Mon.. New Year's Holiday 10 January Mon. Coming of Age Day (the second Monday in January) 11 February Fri. National Foundation Day 20 March Sun. Vernal Equinox Day (around) 29 April Fri. Greenery Day 3 May Tue.. Constitution Day 4 May Wed. National Holiday 5 May Thu. Children's Day 18 July Mon. Marine Day(the third Monday in July) 19 September Mon. Respect-for-the-Aged Day(the third Monday in September) 23 September Fri. Autumnal Equinox Day (around) 10 October Mon. Health and Sports Day (the second Monday in October) 3 November Thu. Culture Day 23 November Wed. Labor Thanksgiving Day 23 December Fri. Emperor's Birthday [Note] 1) When a National Holiday falls on a Sunday, the following Monday becomes a holiday. 2) When a day (except for Sunday and the above) is Sandwiched between national holidays, it becomes a holiday itself. This rule is applicable for the (FRI.)4th of May. Source: Embassy of Japan in Thailand