In 2014 it takes place on September 8th. Chinese people will have a three-day holiday from September 6 to 8. See Chinese Public Holiday Schedule 2014/2015.
When Mid-Autumn occurs at the very end of September or early October it is usually combined with National Day (October 1) holiday for a week-long holiday.
See below dates of the festival in coming years. See left for the best places to enjoy a China tour during Mid-Autumn Festival.