Every new years day and leap day exists as its own thing outside of any particular month. So every year we get a full new year holiday and about every four years it’s a full blown 2 day event. It doesn’t need to even be a named day of the week or part of a named month. It can just be it’s own thing. We can number it as the 0 month if it makes you feel better and to help sorting dates. If we’re feeling sentimental, maybe we can call it Friday the 13th because those won’t be a thing anymore otherwise.
Every new years day and leap day exists as its own thing outside of any particular month. So every year we get a full new year holiday and about every four years it’s a full blown 2 day event. It doesn’t need to even be a named day of the week or part of a named month. It can just be it’s own thing. We can number it as the 0 month if it makes you feel better and to help sorting dates. If we’re feeling sentimental, maybe we can call it Friday the 13th because those won’t be a thing anymore otherwise.