at weekends BrE
on weekends AmE *

At the weekend, he would just watch television all day.

Tell him he can come over at the weekend instead.

He had to get his energy back at the weekend.

Here's a picture of him I took at the weekend.

So this was part of the job at the weekend?

Things started so well at the weekend I knew it could not last.

I hope that everything will go well at the weekend.

I'd probably use most at the weekend but it doesn't work then.

I just saw a number of them in a collection at the weekend.

He thought it over for a minute, and decided to go down at the weekend.