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.
The day that comes after Friday and before Sunday were devoted drinkers gather for kegs of natural light from 10:30am-6pm then followed by more drinking, music ranging from techno to classic sing along music and good times
... not for those who have weak livers....
Bob,"ugh such a long week I can't wait to drink all day at naturday"
Nick" for sure bro I'm going to rage all day and drink out of kegs all day long"