The school drains the pool once a month. ✬

There was a convention last month. ✬

The meeting was last month. ✬

The meeting is held twice a month. ✬

The meeting will be held next month. ✬

The meeting will be postponed till the 20th of this month. ✬

How much is the rent per month? ✬

You're a month behind with your rent. ✬

The first month of the year is January. ✬

January is the first month of the year. ✬