Appearance
He is wearing a Blue Hat With Crazy Big Earflaps along with custom clothing created by Great_Day.

Personality and Traits
Unstable_Day, as the name says, is an unstable individual. They always say that they are having an unstable day if you ask how they are. They speak in all caps, which gives off the effect of them constantly screaming or yelling. He also twitches quite a lot, and just along with speech gives off a tone or unstable behavior he sometimes argues with Unpredictable_Day.