When did Robbie Wiiliams embark on his first concert tour as a solo artist?

Explanation

The "Show Off Must Go On Tour" is the debut concert tour by Robbie Williams. The tour ran from September, 1997, to November, 1997. Since then Williams has embarked on several concert tours: "Ego Has Landed Tour" (1998), "One More for the Rogue Tour" (1998 99), "1999 Tour" (1999), "The Sermon on the Mount Tour" (2000 01), "Weddings, Barmitzvahs & Stadiums Tour" (2001), "2003 Tour" (2003), "Close Encounters Tour" (2006), "Take the Crown Stadium Tour" (2013), and "Swing Both Ways Tour" (2014).