I think this may be the one commemorative/celebratory day that everyone loves and agrees upon. Whoever first floated the idea was a genius.
My mom spent the day at a gala moms-only performance of Puccini's La Boheme and La Traviata, her two favorite operas. Luxury box with her closest friends, complementary drink service, the best opera singers in the world, a magnificent orchestra and an angelic chorus.
I didn't attend because I wasn't invited: I'm not a mom, and I'm not dead. (Thus the angelic chorus.) But my mom sent me Instagram updates and told me she had a fabulous time. I asked her for a recording of the performance, but she told me it would be unavailable on Earth, because it would wipe out sales of all other opera CDs. I guess that's true.
How did your mom spend Mom Day?