I wondered what "Mothering Sunday" was, when I saw it on a calendar. In the South and Midwest, churches have "Homecoming," usually in the fall. Members who've moved away come back to attend their "old" church with family members, and they have a potluck dinner and a choir concert. Pretty neat, but I hadn't thought of a nationwide date for that kind of thing.
Interesting. I grew up in the Midwest and the Episcopal churches had nothing like that. It would have been difficult for me in any case, with all the various Episcopal churches I attended from birth until departure from ECUSA.
The one I remember most fondly (from almost 40 years ago), is sadly the one I most dread seeing after having visited their website. The least of what they've done is to change the altar from facing East to facing West.
But maybe they have finally fixed the roof over the kitchen. (This was a Frank LLoyd Wright design -- I am told his roofs were a weakness.)