If a national holiday falls on a Sunday, the next Monday becomes a "make up holiday".
If a week day is between two holidays, this day also becomes a holiday as a "bridge day".

January
1st   Ganjitsu - New Year’s Day
10th   Coming-of Age Day (annually the second Monday in January)

February
11th   Kenkoku Kinen Bi - National Foundation Day

March
20th   Shunbun no hi - the Vernal Equinox Day

April
29th   midori no hi - Greenery Day
since 2005: Showa Day (the Birthday of the Emperor in the Showa Period)

May
3rd    kenpo kinenbi - Constitution Memorial Day
5th    kodomo no hi - Children’s Day

June

July
18th   Marine Day (annually the third Monday in July)

August

September
19th    keiro no hi - Respect for the Aged Day (annually the third Monday in September)
23rd    syubun no hi - the Autumn Equinox Day

October
10th    taiiku no hi - Health Sports Day (annually the second Monday in October)

November
3rd     bunka no hi - Culture Day
23rd   kinro kansha no hi - Labor Thanksgiving Day

December
23rd    tenno tanjobi - the Emperor’s Birthday