Hug a Furry day is held on the 28th of November in which, if you took part in Beat a Furry day the day before, you must Hug all Furries you meet and you CAN NOT fight back.

Briefly, "the realization that each random passerby is living a life as vivid and complex as your own." Originally from the Dictionary of Obscure Sorrows, which has a lot more beautiful neologism definitions like this you might enjoy.