Usage: Everyday vs. Every day

The proper use of everyday and every day is something that still confuses a lot of people. In fact, you will see "everyday" used instead of the proper "every day" in ads of popular products.

Everyday is an adjective. It is used to describe something that takes place or is done daily or something that is a basic or regular part of something, thus making it ordinary and unexciting.

You say:

As a writer, his everyday routine mostly involves typing away at his computer.

The exhibit is about the basic tools people in the Middle Ages used in their everyday life.

Since becoming secretary to a famous producer, rubbing elbows with celebrities has become an everyday occurrence to her.

Every day is an adverbial. It is used to say that something occurs or takes place daily.

You use it in the same way you say the following sentences:

Every year, I spend my entire summer vacation with my grandparents.

I treat myself to an expensive dinner every month.

I go to Mass with my family every Sunday.

You say:

My chores every day are tidying my room, taking out the trash, and feeding the dogs.

I have lunch at the Italian restaurant near my office every day.

Eating fast food every day is not good for your health.

Every day, I see a suspicious-looking man loitering near my apartment.

You have to use the face cream every day for better result.