regular day off (e.g. closed every Monday)

the twentieth day of the month / twenty days / Short for 二十日鼠 (hatsuka nezumi): a house mouse

one day, 24 hours / the daytime, the period from dawn until dusk / (figuratively) a short period of time / one day, someday, an unspecified day / the first day of the month

a birthday

days (of duration) / (uncommon) appointed date; schedule / (finance, uncommon) interest

the daytime

a day off drinking, a day without alcohol

the Sabbath; the Lord's Day

start date

a few days