Conversation so far:
What is Perfect Symmetry?
Perfect Symmetry is the third studio album by English rock band Keane, released on 13 October 2008 in the United Kingdom.
Did Keane play with the band?
No, the band Keane was named after a friend of Chaplin's mother, whom Rice-Oxley and Chaplin knew when they were young.
What happened in 2008?
The band Keane's album Perfect Symmetry was released on 13 October 2008, and reached number one on the UK Albums Chart on 19 October.
How many records did the band Keane's album Perfect Symmetry sell?
Produced by the band Keane and Andy Green, the album has since been certified as having sold over three million copies worldwide.
Did the band Keane tour in support of their album Perfect Symmetry?
In November of the same year, 2008, the band Keane started their third world tour, the Perfect Symmetry World Tour.

Question: When did they tour?
Self-contained rewrite: When did the band Keane tour in support of their album Perfect Symmetry?