All the months in the calendar have 4 complete weeks because every month has at least 28 days. A few months have some extra days, but they are not counted as a week because these extra days are not enough, to sum up to 7 days (1 week = 7 days).
How many weeks are in a year?
There are 52 weeks in the year. † Note that each week listed on here start on Monday and ends on Sunday. This is the ISO week date standard or ISO-8601.
