If you read the op's posts she says that the day is acknowledged - so I don't quite get your point here!
The entire point of the thread is that the OP is mad that the MIL wants to acknowledge the actual day.
She posted subsequently to say they do acknowledge it (I would venture because everyone came on to say how weird the whole set up is) - so if that is indeed the case, why get so irate that the MIL wants to acknowledge the actual day……..?
I’m a Christmas baby too - so you don’t need to tell me anything on that front! As I said upthread, my parents always made sure I got birthday and Christmas parents, and as a result, I LOVE this time of year! It helps that it’s summer here, and everyone’s on holiday and in a festive mood.
As I have also said upthread, having a half birthday celebration at a different time of year is absolutely fine, if that’s what the OP wants to do.
What’s not OK, is getting so aerated at the MIL for wanting to acknowledge the actual day. That is plain weird.
Especially if, as the OP says, the immediate family do actually acknowledge it! Not letting MIL also acknowledge it is even weirder!
Ans yes - she did ask for opinions, so she is getting them. Although has long since left the thread, so obviously wasn’t happy with the loud and clear feedback that most agree with MIL.
What I would suggest as constructive feedback for the OP, is to allow people to acknowledge the actual day with a card and gift, and carry on celebrating the half birthday as a family as well.
The OP is digging her heels in over something that it’s really not worth falling out over. It’s silly and not conducive to good family relations.
I never understand why people don’t just try to get on! MN is a different world to me, with all the fallings out and needles drama with family members.