I never understood the mentality of people who wanted to rest on Friday nights "after a long week of work." Isn't that the point of a Friday night - to go out after a long week of work?
I turned 30 this year and was probably just as excited as I was to turn 16, 18, 21 and 25. To me, it was a milestone I was looking forward to hitting. I celebrated in true fire sign fashion with a week-long party in the sun with my friends. Now that the party is over, I think I understand more of what "being 30" really feels like. And, it feels old.
I don't feel old in a more mature way, or that I understand the world and its complexities any better than I did when I was in my twenties. But, I actually feel older. Gone are the days of a nonstop party weekend followed by a swift recovery and an accomplished work week. I never valued sleep in my first 30 years as I do now (but maybe that's attributed to a quiet room and a good mattress these days).
I really never got the "Mondays are the worst" sentiment in the office place, but now I do. You realize you likely wasted a good amount of time over the weekend doing what you wanted to do, instead of what you should be doing. To me, Tuesdays are no better.
I suppose "working for the weekend" literally means making the money I need to enjoy myself on weekends, and to rest up for the long weekend ahead.