I asked for suggestion for the costume for "Myon day", but I ended up debating myself between two options: "green bodystocking" and "cat maid"...

No matter how you look at it, there's just one valid option!

So in the end I went with cat maid

← Green bodystocking

Dressing like this for the whole day and having people see me like that would just be surreal!

The date is a pun: Myon → mi(3) yon(4)