Please help resolve a dispute between DH and I. I'm going to try not to give away which side I'm on. DD is three on a Monday. One of us says we have to do her birthday party the weekend before as it's closest to her birthday and that that's the convention and everybody knows that, the other says that it can be done either weekend either side of her birthday or even at a different date entirely, there is no convention, we can take our own convenience into account. Please discuss. Once I've got enough evidence to take back a reasonably unbiased reply to DH I'll tell you which side I'm on.