Passage: The IRB requested that any member unions wishing to host the 2019 or 2015 Rugby World Cup should indicate their interest by 15 August 2008. This would be purely to indicate interest; no details had to be provided at this stage. A record ten unions indicated interest in hosting either the 2015 and/or the 2019 events. The 2019 tournament received interest from nine different nations.

Question: when was the deadline for indication of interest?
15 August 2008