the National Foundation Day (day for celebrating the founding of Japan, established as February 11, in 1967, formerly called 紀元節)

fifty days / Short for 五十日の祝 (ika no iwai): a Heian-period celebration on the 50th day after a child's birth / Short for 五十日の餅 (ika no mochii): mochi fed to the child during ika no iwai

五日 (itsuka, go-nichi, “fifth (5th) day”) / 十日 (tōka, jū-nichi, “tenth (10th) day”) / 十五日 (jūgo-nichi, “fifteenth (15th) day”) / 二十日 (hatsuka, nijū-nichi, “twentieth (20th) day”)

the forty-ninth day after a person dies / the Buddhist memorial service that occurs forty-nine days after a person dies

the forty-ninth day after a person dies / the Buddhist memorial service that occurs forty-nine days after a person dies

Independence Day

Yokkaichi, a city in Mie Prefecture, Japan.

the twentieth day of the month / twenty days

(literally) a short-lived regime / being in power over a very short time

Have a nice day!