User blog comment:DiegoAnime3000/RWBY's characters new models!/@comment-4010415-20140214080510/@comment-24053809-20140214110059

I've been thinking about that alot aswell. We have no idea how long a year in the series is or when the characters birthdays are. Hopefully in the near future, Monty will release more detailed information about the show and the world in which it is based in.

But as usual, RWBY is still a young show and isn't even a 1 year old yet so it might take some time for Monty to iron out the smaller details about it such as how lond a year is or, as stated above, the characters birthdays.