Booked a party for DC in Reception. Just realised two other children's birthdays are very close to hers. Should I send a friendly email to their parents to say something along the lines of 'I am holding a party for DC on this date - really hope it doesn't clash with anything you may be planning!'? Or will I look like a loon? Don't know the mums that well but am planning to invite their DC to party. I thought it might be courteous but don't want it to look like I have 'reserved' the date and am forbidding them from doing anything on that date too! It's too early to give out invites yet. Thoughts?