I know this is a late response now but after reading everyone else's comments I had to post my own anyway.
I'm not a mother now but years ago I was a mother figure for my previous boyfriend's son. We lived together and while he did have some contact with his birth mother, she had minimal time for him. Anyway, it was the Friday before Mother's Day and I knew they would be making something in his 2nd grade class for their mothers, so I was kind of excited to see what I would get, as it would be my first ever mother's day gift. Well, Josh came home from school, all excited to show me something, but when he did, I confess my heart fell. Since he wasn't going to see his mom, he decided to make a present for his dad instead. It was a really cool booklet that he colored. He had to answer all kinds of questions that pertained to his dad, and also questions about himself. It was way cool and I admit I was a little heartbroken and jealous. But, I know Josh didn't mean to hurt my feelings (in fact, later he apologized for not thinking of me--I don't know if his dad told him to or not). I guess I just felt more like his mother than he felt I was!
So now I'm married and my husband and I both don't want kids this late in life. (We're content with our many nieces and nephews). But there's another raw chord...Valentine's Day. Before we started dating, I was single for several years, and I was excited to have a boyfriend when our first V-Day together rolled around. Then out of the blue, and kind of at the last minute, he informed that he doesn't celebrate V-Day--it's just a Hallmark Holiday and he doesn't need a special day to tell me he loves me. He called Mother's Day a Hallmark Holiday as well, yet he takes his mom out for lunch to celebrate it every year, but he won't budge on V-Day. We did compromise that first year and say we would celebrate without having to spend money on presents or dinners--just some quiet time together and maybe rent a movie--but it hasn't happened since that first year. I guess I've grown used to it, but I wouldn't mind if he suddenly decided to celebrate!
The reason I brought it up here is because after reading so many comments from mothers here who say they'll celebrate M-Day for themselves if their families don't celebrate it, I think that's what I'll start doing for V-Day. What a great idea!