8 Miles Every Day (everyday error)

A headline in this video says "Over 34 Years, 8 Miles Everyday."

And then this one: I see this mistake all the time (every day, it seems). Yes, it's an everyday occurrence. So I'll tell you the rule here again:

If you can substitute each day then it should be two words.
--Please use this word correctly every day.

*If it modifies a noun, it should be one word.
Join this campaign of everyday people and use these words correctly.
I know I'm only one woman, but I believe that everyday folks can make a difference.