Mothering Sunday is on a suite of songs on the album Sedgefield Fair: More?-?or?-?less traditional songs from England & Scotland by Jane Peppler (piano by Jacqueline Schwab) mentioned as "Learned from the Oxford Book of Carols" with these lyrics:

It is the day of all the year, of all the year the one day
That I shall see my mother dear and bring her cheer a mothering on Sunday

So I'll put on my Sunday coat and in my hat a feather
And get the lines I writ by note with many a note that I've a-strung together

And now to fetch my wheaten cake, to fetch it from the baker
He promised me for mother's sake, the best he'd bake for me to fetch and take her

My sister Jane is waiting maid along with Squire's lady
And year by year her part she's played, and home she's stayed to get the dinner ready

For mother comes to church, you see, of all the year it's the day
"The one," she'll say, "that's made for me!" And so it be - it's every mother's free day

The boys will all come home from town, not one will miss that one day
And every maid will bustle down to show her gown, a-mothering on Sunday

It is the day of all the year, of all the year the one day
And here come I, my mother dear, to bring you cheer a-mothering on Sunday

That's where I heard about Mothering Sunday, which was never going to be a holiday for me, having spent most of my life motherless.

Joanne in Cleveland