No, everyday and every day aren’t the same thing.
Everyday means ordinary, of the norm, or relating to something that happens daily. For example, it’s an everyday thing or I’m wearing my everyday clothes. Overall, it’s something that’s fairly commonplace.
Every day, on the other hand, is something that happens, well, every day. For instance, I go to work every day except Sunday, or the shops are open every day of the week.
And funnily enough, it’s shops and big business (who employ marketers and advertisers who should know better) that trip on this most often.
“Lowest prices everyday” is one I’ve seen floating around, but it doesn’t quite make sense. It’s either “Lowest prices every day”, which means they have the lowest prices every day of the week, or it’s “everyday low prices”, which are the same prices every day and that’s the norm.
What about “we’re open everyday”? Unfortunately, it doesn’t make sense either. What they’re really trying to say is, “We’re open every day.”
So how do you avoid this little error?
Ask yourself these questions:
Do you want to say something is ordinary or of the norm? Use everyday.
Do you want to say something happens every day of the week? Use every day.
It’s an everyday problem, to be sure, but not one you really want to see every day.