To be honest I don't think there is a kitten season nowadays, I hear of just as many kittens being born at all times of the year. The only difference is the times of the year we are asked to take kittens in. e.g. between Dec and April when everyone wants kittens people tend to find homes for their own cats kittens and we are asked to being very few into care. When the 300 or so phone calls for kitten we have a month dies down about May, we then start getting the calls from members of the public saying I have some kittens for you I can't find them a home. This usually happens a couple of different times a year.