Hi GE
Mother's day, eh? I was very lucky when my mum was alive, she'd have no truck with it, so I was off the hook.
My wife is a different kettle of fish! (I could probably say that in any context that came up!
).
Earlier today, when the postman had been and gone - there was nothing from our son! (Our daughter, you won't be surprised to hear, has never missed! We had a card from her days ago.)
In the afternoon, my wife said, get on to him, see if he's forgotten. So I rang him up, and reminded him, "You haven't forgotten it's mother's day, have you mate?" "No, dad, I've got a bunch of flowers on the way!"
And, literally, 10 minutes later the doorbell went, and it was the local florist, with a huge bouquet of flowers! 
But I'm with my mother - MD is an invented celebration, IMO, to raise money for the card and florist industries! AIBU? 