Ok, so the RP won't be all mixed up and such, im letting you know that:
GO BY THE SEASONS IN REAL LIFE! for the rp's sake.
For example: It's december 25, people should probobly be talking like this:
Bob made a snowball outof the snow on the ground and threw it at Bill.
like that XD
For people who always have summer/winter in there countries, just go with whatever the other person is saying.
If you have any further questions, don't be afraid to ask ^^