The Playstation 4 will be released on November 15th 2013 in the US and Canada. The release in Europe, Australia and Latin America will happen on November 29th 2013. South Korea, Hong Kong and Singapore have a more approximate release date for December 2013, while the Middle East have a confirmed date for December 13th. The word is that Japan will get it on February 22nd 2014 and finally, China's date is still to be announced.
For further information about the release date, including up-to-date news and rumors about said date, check out the following page: