Opposite of "yesterday", so it must mean "tomorrow". Oh, right --- of course it does --- it's spelled a lot like, "not today", so it must mean a subsequent day from the present one.
Or maybe "noterday" refers to the weekly 24 hours when all the "noters" perform their assigned clerical duties in a noter republic.
Name for the days of the week when a person retires. Every day has the same importance hence it's a Notherday. Weekends are non-existent. Retiredpeople have Notherdays and tomorrows
Everyone has experienced a shitty day at some point in their lives. Some of these days are so bad that positive terms like yes are not okay to describe it. That is where nosterday comes in. It is a term used whenever you do not wish to use the yes in yesterday and need a suitable alternative.
Frank: Hey, how were you yesterday?
John: Awful. I got fired from my job, the bank foreclosed my house, and my drug dealer got arrested. It was an utter nosterday.