You ask two questions are you overreacting? .....YES
What should we do ? ...NOTHING
...maybe she’s a child who takes no notice of what month her waking days are in, whether we are in March, April, or May
A lot of European countries don’t start school till they are 6 or 7 or maybe she s not at school or because of the pandemic and maybe at 7 she has no idea of what month we are in whereas if she was at school they would have the date on the board etc
You seem to have a dislike for your daughter in law so it’s her to blame, but your son is a parent too surely if he didn’t like what they are doing he would have said
It’s not what I d do and seems pretty daft BUT perhaps other friends of theirs out there, are doing the same, who knows but whatever the reason you just have to accept it’s their way and go along with it hopefully the month will soon be up and
she ll play with her new presents
Don’t look for things to hang on the daughter in law
espee how will the child know when her birthday is during lockdown there are no clues really, every day is the same as the last, without looking on my iPad I often haven’t an idea what day or date we are on 7 isn’t very old and some kids are younger than others