What has tewelve months in it?

A year has twelve months in it. Each month varies in length, with January having 31 days and February typically having 28 days, except in leap years when it has 29. The other months—March, April, May, June, July, August, September, October, November, and December—each have either 30 or 31 days. Together, these months make up the complete calendar year.