User blog comment:BlueBarracudas555/Ridonculous Race Contestants Ages/@comment-37616026-20190125091717

How the years are viewed, based of hints and confirmed events:

2007 (TDI/TDA)

2008 (TDWT/TDROTI)

2009 (TDAS/TDPI)

late 2009/early 2010 (TDRR)