The release date is listed as 2009, it is apparently 2006 or 2007 though. Nov 8 2006 was Window Vista's manufacturing release. Jan 30 2007 was the consumer release.

This is assuming the Vista version is the same. I didn't actually know that it came with Vista before just now.

"Purble Place was publicly introduced in Windows Vista build 5219 along with Chess Titans and Mahjong Titans." https://en.wikipedia.org/wiki/Purble_Place

"Build 5219, also known as CTP1 and September CTP, was distributed among 2005 PDC attendees on September 13, 2005, and has been released to Microsoft Beta testers and MSDN subscribers" https://en.wikipedia.org/wiki/Development_of_Windows_Vista

So the very first public release date would be September 13, 2005, same goes for Chess Titans and Mahjong Titans