Every day vs everyday? [duplicate]

This dilemma is relatively common among people, it can be slightly confusing at times. Every day means each day whereas everyday is an adjective used to describe something that has been/has been seen used every day.

Everyday: These are great clothes for everyday use.

Every day: I exercise every day in order to remain fit and healthy.

"Everyday" is an adjective used like "ordinary" or "usual"; it modifies a noun.

"Every day" is an adverb used like "ordinarily" or "usually"; it modifies a verb or adjective.

As a simple test, try replacing "everyday" with "ordinary", and "every day" with "ordinarily", and see if it means what you meant to say.

Which one is obviously wrong?:

• «I miss you. That's the hardest thing I've got to deal with ordinary» (≡ everyday)
• «I miss you. That's the hardest thing I've got to deal with ordinarily» (≡ every day)