Board Thread:General Discussion/@comment-1255374-20150429022629/@comment-995426-20150511133713

Well, if the turtles were still 15 in North Hampton, then it implies that the invasion happened in winter after December. Then everything that happened "last year" (the Technodrome incident, the spilling of the mutagen, Jason's mutation, the turtles' 15th mutation day) had still happened less than a year prior.

Although, the show still hasn't explained how it was immediately summer-like warmth when they reached North Hampton, with no further signs of winter or spring. I already added that in the Errors section of long ago. :) The show has a bad track record of portraying only one unchanging kind of weather except when it's plot-convenient. I mean, it should rain sometimes when they're above-ground.