Appreciate I might be reacting a little sensitivly to this. Relevant back points are that I'm delightfully hormonal after recent birth of DC2. There's also an existing theme of me feeling like my in-laws treat our nieces (SiL's children) more favourably to our two DCs.
So, DC1 turned five this weekend. Old enough to know what their birthday is, get excited etc. "Big day" arrives... Nothing from DH's family at all. No card, present, message, phone call, nada. After DCs bedtime I got a message from SiL indicating that they'd got DC1 a present but will give it to him when we see them next (at another child's party in 2 weeks time). Didn't actually say happy birthday or anything. Nothing at all from either of DH's parents. I told DH at the end of the day I felt a bit disappointed with his family's complete lack of effort or acknowledgement.
DH's perspective - His family just do things differently and as we're seeing them in 2 weeks time anyway they'd just assume we'd be OK with waiting for gift etc. They show love and their relationships work in different ways to my family and it's just that I'm not used to it.
My perspective - I agree with the latter part entirely, and it's ok that they do things differently. However... I think where a child is involved it's more of a thing to make the effort to wish them a happy birthday on the day. I mean, sending a text or calling to speak to DC1 would have been so quick and easy. I feel like this isn't a case of showing care in different ways as opposed to not showing care at all. The big stickler for me is that this isn't how our nieces are treated at all. In fact, this year MiL made their birthday cakes (as she always does), spent the day with them, held them their own party just for them at her house and posted about all of this on social media repeatedly. DH still doesn't buy that his sister's children are favoured over our own. I beg to differ.
For what it's worth I'm angry on behalf of my DC and worry that as they get older they'll pick up on it, but ultimately it's my in-laws' behaviours and choices that mean our DCs won't feel as close to them.
So... AIBU to think they could have at least called and spoken to DC1/ acknowledged the day?