Unstable_Day is one of the Days in The Days Union group.
Unstable_Day, like his name says, is very unstable, even in his twitter. He yells things on all caps with bad grammar and sometimes argues with Unpredictable_Day. In his debut, he is in The Days Union base along with Albert and all the other Days. Just like all the other days, he has a residence in The Days City.
- Unstable_Day is what Albert relates to the most.