Originally Posted by QuiltnCowgirl
My thought is that your plans have been made long before the invitation was received. Therefore, your husband should graciously represent both of you at his grandson's party, supportively explaining that you had a trip planned a year ahead that could not be cancelled. And, you should make plans to do something just from you to the grandson as a token gesture of good-will.
Just what I would do...take what works for you & leave the rest.
I couldn't have said it better. They know when the birthday is so they can look at a calendar and decide when to celebrate early enough for others to work around it. My grandsons birthdays are two consecutive days (born two years apart.) The first birthday is celebrated the weekend before and the second birthday is celebrated the weekend after. I can predict until they are grown when the parties are and not make other plans.....