How many Months have 31 Days?

12 months make up a complete year.

Answer: 7 months have 31 days.

Explanation:

A normal year has 365 days while a leap year has 366 days. 

A month can have 30, 31, 28, or 29 days.

February is the only month that has 28 days except on a leap year when it has 29 days.

Thus, January, March, May, July, August, October, and December are the 7 months that have 31 days.