May 12. The day that celebrates Amy Rose, the Sonic character introduced in 1992 in a manga as Emi and got remade in Sonic CD as Amy. She had a redesign in 1999 with Sonic Adventure and had playable appearances in Sonic Adventure, Sonic Advance 1,2,3 Sonic Hero and the Sonic Boom games.

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.