I'm still amazed that there is short English word for "a person that makes up crosswords" (cruciverbalist) and there is none for "the day after tomorrow".
@johny You're right! let's make one up! How about postnextday?
@johny aftermorrow? threemorrow?
@jannamark Tomorrow++ made me laugh. Maybe you should recommend it to Oxford dictionary? Get some money as reward?
@johny please let's not tomorrow++