Check this sentence....

Does he work everyday or only on the weekend?
Does he work everyday or only on weekends?

There 'every day' is correct, not "everyday".

canadian45There 'every day' is correct, not "everyday".

Right!

Rover_KEDoes he work every day or only at the weekend?

Now that sounds very strange to my American ears. We use "at" for places, not times.

My father worked at the steel mill all his life.

AlpheccaStars Rover_KEDoes he work every day or only at the weekend?Now that sounds very strange to my American ears. We use "at" for places, not times.My father worked at the steel mill all his life.

I think they pronounce it weekEND. Does that help?

AlpheccaStarsWe use "at" for places, not times.

at night
at noon
at 7:00
at dawn
at sunset
at sunrise
at present
at dinnertime
at the moment
at the weekend / at the end of the week

As an American, I naturally favor on the weekend.

AlpheccaStars We use "at" for places, not times.

except for the following, and perhaps other, examples

He will arrive at 4 o' clock.
It has to be done at the right time.

(I just noticed the above post. That happens when you start a post and don't get around to finishing it for a while.)