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”)

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

seventeenth day of the month

fifteenth day of the month

eighteenth day of the month

sixteenth day of the month

the thirtieth day of a month / thirty days

the final day of a month / the thirtieth day of a lunar month

thirteenth day of the month

eleventh day of the month