Of the following months, which has the most amount of days?

The story behind the answer

December is correct because it has 31 days, while April, September, and November each have 30. In the Gregorian calendar, seven months have 31 days; the rest have 30, except February.

A handy way to remember this is the rhyme: “Thirty days hath September, April, June, and November; all the rest have thirty-one, excepting February alone.” You can also use the knuckle trick: each knuckle is 31 days, the dips are 30 (or 28/29 for February). Fun fact: “December” comes from the Latin decem, meaning “ten,” because it was the 10th month in the old Roman calendar before January and February were added at the start.