I don't care either.
I just don't like doing A Day because everyone is doing it.
On this day, you must do X, Y, Z because it's expected. That's why, to me, valentine's day is the most unromantic day of the year. 
And mothering sunday. On this day you will do X, Y, Z to show that you care. Because everyone does.
But, each to their own and for a lot of people it does mean the world. I'm not saying they're wrong for feeling the way they feel - I just don't understand why. I don't understand what's romantic about organising a display of romance because the calendar says it's time and I don't understand what is showing appreciation for your mum because the calendar says it's that day of the year again. And I wonder if it's because they feel they're supposed to.
And I know - people can and do do both. I'm not saying it's either/or. I just don't get what's nice about doing something not because it's coming from you in any spontaneous way but because it's that day of the year again and everyone does it. Why not be romantic on June 8th, or take your mum out for dinner on August 16th. Why everyone pile in on the same day of the year, every year, because that's The Day.
But it's very difficult to express that POV without people feeling like it's a criticism of them, which it's not.