How many months of the year have 28 days ? Answer: At first glance, this question can be a bit tricky or seem like a riddle. The common assumption is “February” because it normally has 28 days (except during leap years when it has 29). However, the correct answer is: All 12 months of the year have at least 28 days . Learn how the Gregorian calendar divides the year into 12 months with varying lengths, from 28 to 31 days . Find out why February is the only month with exactly 28 days in common years and 29 in leap years. All twelve months have at least 28 days , February has exactly 28 days except for leap years. All 12 months have at least 28 days . February is the only month that has exactly 28 days in common years, and 29 days in leap years. So, technically, no months have "only" 28 days , but February is ...