EVERYDAY vs. EVERY DAY

What is the Difference Between Everyday and 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
( Everyday is an adjective
  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
( Every day is an adjective + a noun
( Every day = each day
 
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.