Subtle clickbait. Promising "the day return became enter" to entice. It can be narrowed down to a single day, or at least close enough to a single event that way can pick an effective day? Was it a single product release? A single software release? I'll read the article to find out.

> There was no day, no single event when Return became Enter

Oh, never mind then...

Could've just titled it "The history of how Return became Enter" or "How Return became Enter"