I have no pressing business on weekends, so I usually sleep in.
Unless "the weekends" is a place you can go to, then no, it isn't correct. It is best to say "On the weekends" if you mean the days Saturday & Sunday.
no but some say they are
nothing
There is nothing to say its important to close folders. You can keep them up when you like.
nothing you can afford...i can say that
There is something, but it's not important.
I would say the peak traffic times would be in the evening and on weekends.
Schönes Wochenende! = Nice weekend!
It depends how important it is. I'd say before 9 am is too early.
Generally, nothing is. if you want to say nothing isn't, you can say something is
people say they want 4 day weekends because they are tierd of school and they want more weekend time to have fun
Yes, of course, unless you leave your eyewear off over the weekends.