Does anyone, apart from Argentines attach any significance to Mother's Day? When I lived in the UK and my mother was still alive, I would send her a card, if I remembered and very possibly take her out in the car. But it was never a significant day for most of us in the UK.
Argentines are obsessed with special days - friends' day, mother's day, fathers' day etc etc.
I really don't give a monkey's, especially since I have to show appreciation for someone else's mother not even related to me, or various mothers for that matter.