How Many Months?

Riddle: Some months have 30 days, some months have 31 days. Which months have 28 days?

Answer: All twelve months. Does all the twelve months have at least 28 days?

Source: https://www.riddles.com/2554

Riddle: Some months have 30 days, some months have 31 days. Which months have 28 days? Answer: All twelve months. Does all the twelve months have at least 28 days? — by NEO JIA QI v1.

Riddle: Some months have 30 days, some months have 31 days. Which months have 28 days? Answer: All twelve months. Does all the twelve months have at least 28 days? — by NEO JIA QI v2.