Quote from Miss Patty in But Not as Cute as Pushkin
Miss Patty: No, honey, the party's on Tuesday, the 30th. Lorelai: So? Miss Patty: So, the 30th is the "dark day". Lorelai: What dark day? Miss Patty: Luke's "dark day". The day that he disappears. Lorelai: Disappears? Where? Miss Patty: Nobody knows. Nobody knows where he goes or what he does, all we know is not to try and find him. Lorelai: Why didn't I know about this? Miss Patty: I don't know, honey, everyone else does.