It's time for another On This Day In Supernatural-Universe History!
March 24, 2006 - Sam and Dean arrive in Oklahoma to investigate an odd bug-related death in a housing development. Now let's never speak of this again.
March 24, 2007 - The boys are planning and preparing to purposefully get caught by the police and thrown in prison in Arkansas, in order to help out one of John's old Marine-buddies.
March 24, 2008 - Sam and Dean are possibly dealing with the emotional turmoil of Dean's momentary belief that his father was actually communicating with him from beyond the grave, only to discover that it was just a gross-monster guy who worked at the phone company.
March 24, 2009 - Sam Wesson accidentally hits on Dean Smith in an elevator...awkward on so many levels.