noun, adverb
a certain month; some month
Used to refer to an unspecified month, often in formal or written contexts. Can function as a noun or adverbially.
某月某日、彼は突然姿を消した。
On a certain day of a certain month, he suddenly disappeared.
その事件は某月に起こったと記録されている。
It is recorded that the incident occurred in a certain month.