Everyday, Every day . Everyday (spelled as one word) is an adjective: "The dishes were intended for everyday use." Every day (spelled as two words) functions as an adverb: "I washed my hair every day."

• Incorrect. I work out at the gym everyday.
• Correct: I work out at the gym every day.

Campbell, M. D. (n.d.). Commonly Confused Words. Retrieved December 17, 2012, from http://public.wsu.edu/~campbelld/keyto.htm