Parents Association and Mothers Day

[redfairy]

OK, so my punctuation and grammar aren't too hot.
Please can you advise me where to put the apostrophes in Parents Association and Mothers Day.

I would use Parents' Evening (for it is for parents, plural), and, because I have moments of extreme pedantry, Mothering Sunday.

meditrina - I was going to say the same about Mothering Sunday! (My Ma would say there's no such thing as Mothers' Day)

Surely Mother's Day is wrong (it is a day for all mothers, not just one). But all the cards in my local shop say "Mother's Day".

Parents' Evening ,and if you're in the UK, Mothering Sunday.

In the Us, it's Mother's Day.
(and it's Mother's singular, because you are celebrating your own mother)

but not in the UK