I really don't want to play up birthdays. So for proper manner training, could we have a fall, spring, winter, summer birthday bash and invite the parents to help with the celebration. If there is a JW in the class it is played down as much as possible, but the birthdays are celebrated and all are happy. No big la te da but just a snack and punch and napkins and maybe a lace table cloth.
Manners are important in Kindergarten.