In the Anglican church when I was young we had something called "Mothering Sunday", celebrated during Lent. It was separate from "Mother's Day" and I never really understood the origin or meaning . Wikipedia has some info on it here.
I wish all mothers then a lovely day with messages of love from your children- and especially for mothers who have lost a child I send blessings for love and comfort this day.
Mother's Day-or any day for that matter- is never the same when you have lost a child.