Everyday vs Every day

Everyday vs Every day

Everyday and every day are commonly confused in English.
There's no difference in pronunciation, but using the wrong one when writing is a mistake in the everyday English you use every day.

Everyday
Everyday is an adjective that means commonplace, ordinary, or normal.

These shoes are great for everyday wear.
You shouldn't wear an everyday outfit to the wedding.
Don't use the everyday dishes - it's a special occasion.

Every day
Every day means "each day."

I go to the park every day.
I have to work every day this week except Friday.
Every day I feel a little better.

Common Errors
I used to jog three miles everyday.(incorrect)
I used to jog three miles every day. (correct)

The Bottom Line
Everyday is a single word and is an adjective, so it's the one that is used in front of a noun to describe something as normal or commonplace.
Every day is an adjective (every) plus a noun (day), and it means each day.

Source: http://www.elearnenglishlanguage.com/