WHY IT'S MOTHER'S NOT MOTHERS OR MOTHERS' DAY.

If the holiday was instead called “Mothers Day,” it would imply the day was dedicated to celebrating all mothers or motherhood in general. If the day was called “Mothers’ Day,” it would mean the day belonged to all mothers—and you would need to buy a lot more gifts!

By using the name Mother’s Day, the holiday indicates that it belongs to each individual mother, just as Jarvis wanted.

Happy Mother's Days Great Mesher.