Antonyms: Cool Unconcerned Indifferently Apathetic Loath.
Neat, orderly, organized, clean
If you have to be opposite on opposite day, that makes it a day, and then there was no opposite day. But that can't be true since you HAVE to be opposite, which means that you have to be normal even...
no the opposite of the opposite is the original No, but backwards backwards is backwards backwards.
a regular day