Sun. 3 May - Kenpō Kinenbi (憲法記念日)
Kenpō Kinebi, or Constitution Memorial Day, is a day to look forward to the growth of the country, observed on the date of the promulgation of the postwar constitution in 1947.
Mon. 4 May - Midori no Hi (みどりの日)
Midori no Hi, or Greenery Day, was formerly observed on 29 April, the birthday of the late Emperor Shōwa (Hirohito), when this date was kept as one of the 'Golden Week' national holidays after the death of the Emperor. Named for the late Emperor's deep affection for nature, Greenery Day is a day to commune with nature, appreciate its blessings and enrich one's spirit. Prior to 2007, 4 May was a Kokumin no Kyūjitsu, a weekday between two national holidays; it became the Greenery Day national holiday when 29 April was renamed Shōwa Day.
Tue. 5 May - Kodomo no Hi (こどもの日)
Kodomo no Hi, or Children's Day, is a national holiday to respect the individual character of children, and to promote their happiness and appreciation for mothers.
Traditionally, the observance known as Tango no Sekku (端午の節句), in which families pray for the health of boys, hanging carp streamers (koinobori / こいのぼり) outdoors and displaying dolls in traditional armor or helmets inside the home, is celebrated on this day.
Wed. 6 May - Furikae kyūjitsu (振替休日)
When a national holiday (in this case, Constitution Memorial Day) falls on a Sunday, the following weekday (Wednesday) is designated a substitute holiday (furikae kyūjitsu / 振替休日).