December because the social calendar fills up, children are happy and people are generally on holiday and relaxed, the years winding down with New Years promise right round the corner.
November. It's right after my favorite holiday. The weather finally starts cooling down. Ski slopes open! Thanksgiving food is delicious. There's holiday spirit but it's not force fed down your throat like in December. And it's my little brothers birthday
My favorite month is September because there's a few birthdays in September: Mine on the 7th, My younger brother's on the 13th, and my older brother's on the 23rd. Yay!