noun, adverb
Used as a noun or time adverbial for the day of the week. It can take particles such as は and に, or appear at the start of a sentence as a time expression.
月曜日は燃えるごみの日です。
Monday is burnable trash day.
次の月曜日に会いましょう。
Let's meet next Monday.
I'll call first thing Monday morning.