Do what you want to do when you want to do it. Anytime you want to.
Good bud told his recently retired BIL, to you every day is a Saturday, then throw in a Christmas...
Some are able to retire and enjoy life. Others, not so much. I've seen examples of both.
I don't know if there is a secret. I choose to keep working, as what I do isn't hard, is pleasurable and I can get away from the house. I can sit here, typing on my computer, talking to your guys, do some work on the side....
And when I go home, I have plenty of time to do what I like to do.
DF