Learn English – A word for “from one day in a month until the same day in the next”

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Is there a word that can help me describe a period that isn't exactly a calendar month, but is meant to serve as a month regarding, say, a service or rental period?

For example – if my rental starts on the 15th of January, I am being billed for Jan 15 – Feb 14, then Feb 15 thru Mar 14, and so on.

Your contract isn't for complete months, rather for ________________.

What can I call these periods? I need "month" to be used strictly for calendar months. OR – say I call January a Calendar Month, this period would be a ___________ Month?

If I was talking about days, I could say 24 hours, but I can't do something similar here because there aren't always 30 days in these "months".

Best Answer

I would say solar month if I wanted to be absolutely certain that "month" is interpreted as a period of a certain amount of days and hours.

However, calendar month is technically the term for what you describe, although someone may misinterpret as "January", "February" and so on:

The period of duration from the same date of one month to the same date of the next month, and thus can be 28, 29 during a leap year, 30 or 31 days long. For example the duration from 21st January to 20th February.

(from https://en.wiktionary.org/wiki/calendar_month ).