My favorite month is the same as my Birthday month - August. It's not my favorite because of my Birthday...at least, not necessarily; a handful of my family members are also born in August - my mom, dad, and sister all within a week of my own at that, meaning we get to go on holiday and have fun our special days.
August is also the only month where I don't have to turn up to school, given it's summer break, meaning I can spend a lot of time at home. The weather is...nice for it being the UK, and most of the heatwave-esque temperatures are in July, so...
Aside from August, I also like October (Halloween) and December (Christmas). Don't really have any strong views on any other month, except for perhaps November, which is often the Halloween-Christmas bridge and is often overshadowed because of it.