1st New Year's Day (gantan): January 1 is the only official new year’s national holiday, but the period (shogatsu) typically runs at least until the 3rd and many businesses only re-open on the 4th or 5th of the month.
12th Coming of Age Day (seijin no hi): Young adults come of age on their 20th birthday – this is celebrated with a holiday called seijin no hi.
11th National Foundation Day (kenkoku kinen no hi)
21st Vernal Equinox (shunbun no hi): This holiday either falls on the 20th or 21st of the month - in 2010 and 2011 this is celebrated on the 21st – the date is determined in February of the preceding year.
29th Showa Day (Showa no hi): This is the birthday of Emperor Hirohito (the Showa ere Emperor). This is sometimes included in “Golden Week” (described below), and simply depends on the day of the week April 29 falls on each year.
3rd Constitution Memorial Day (kenpo kinenbi): Commemorates the day on which Japan’s post-WWII constitution took effect.
4th Greenery Day (midori no hi): This holiday is set aside to encourage people to “recon…