I have two children born on the same date but two years apart.
DS1 is almost 5 - he has just started school.
DS2 is almost 3 - at nursery.
We are hoping to have a wee party for them. We live rurally and class sizes are small. We were going to invite the whole of DS1's class, and just a couple of nursery/family friends for DS2. Party is just in the garden.
Should I mention on the invite that it's a party for both of them? I don't want people to feel like they have to bring 2 presents, but at the same time if I only mention DS1's birthday to DS1's friends, and DS2's birthday to only DS2's friends then given that DS2 isn't going to have very many guests coming especially for him he might notice that everyone is saying happy birthday to his brother and not him.
If I was a guest I'd probably prefer to know it was a birthday for both of them (lots of DS1 friends' parents know DS2 too due to playdates, school pickups), and then if I chose to bring two presents would maybe split the cost of what I'd usually spend on one child and get 2 of something smaller. However I appreciate and understand that not everyone might want to do that.
WWYD? I figured I've got this for years to come, so might as well try to get it right!
YANBU - mention that it's a double birthday on the invite
YABU - mention only one child's birthday depending on who the guest knows best