Between-Days

You know how when you're awake up late at night, after midnight, and you're telling someone what you had for lunch that day, you refer to "today", and then you realize that you're technically referring to "yesterday", but you let it go because you got the concept across, and who cares anyway?

Well, I care. I care enough to at least propose new names for these in-between pieces of the night:

Muesday
Tednesday
Wursday
Thriday
Fraturday
Satunday
Somonday (It could be Sonday, but it sounds too similar to Sunday)

Their meanings should be self-explanatory.