When I was single and my daughter went to college I used to volunteer on holidays, in homeless shelters. I really need to do it now too but I am too busy with two jobs. When I did though, I really liked it and I remember I was so humbled the first time around when I volunteered. Not only I was exhausted from work in a soup kitchen, I didn't feel like complaining about anything as my life was a paradise in comparison.

In general I don't particularly care about birthdays. I didn't do anything for my 50th either. Just treat it like any other day.