President's Day

I would say that the majority of people have to work on President's Day. So, tell me, why is it a holiday? I remember when we used to have Washington's and Lincoln's Birthday as holidays, and while I think the idea was to honor all presidents, and we couldn't just make every birthday of a president a holiday, I'm not convinced that every president deserves to be "honored" with a holiday. But, who would choose which one was worthy and which ones weren't. So, one day honoring the leader of the country, I suppose can deal with, but, shouldn't everyone get it off work?