The first day of Takayama Spring Festival
The first day of Takayama Spring Festival is held on April 14. Takayama, Gifu, Japan. This event in the second decade of the month april is annual.
Buddha's Birthday on April 8 (Buddhist festival - 灌仏会 - Matsuri, which is held in Japan. It is also referred to as Hana Matsuri, "Flower Festival");
Black Day on April 14 (South Korea, Japan, Taiwan. An unofficial holiday celebrated annually by single people - unmarried or unmarried people);
Restoration of Sovereignty Day in Japan on April 28 (主権回復の日 Shuken kaifuku no hi - It marks the end of the American occupation of Japan on 28 April 1952);
Shōwa Day in Japan on April 29 (昭和の日 is celebrated in Japan to commemorate the birth date of Emperor Showa or Hirohito, the emperor of pre and post-World war II);