According to OED, the adjective everyday, meaning ‘happening or used every day’ or ‘commonplace’ (everyday chores), is written as one word, whereas the adverb meaning ‘each day, daily’ (I get up at six every day) is written as two.
However, we can often see everyday used as an adverb but written as one word, even in authoritative publications. For example, I have read the following on Forbes.com: "Maybe you go to the same pizzeria everyday…" (https://www.forbes.com/pictures/efkk45khfk/dont-get-stuck-in-a-routine/#27918af73775).
Bon Jovi has a song called "Everyday" (always written as one word) but he sings "I'm gonna live my life every day"…
So, is this really a mistake to write the adverb as one word?
Best Answer
The example, "Maybe you go to the same pizzeria
everyday..." is incorrect, and any editor would correct that to "every day".Your understanding is correct, and better than the large number of native speakers who make this everyday mistake every day.