Kunming's contribution to the May Day holiday: dances, shows, car beauty contests, bull fighting (in Shilin)...all over the official holiday period.
The festival is regularly held over the May Day holiday. The 2013 festival schedule can be found here http://en.kunming.cn/index/content/2013-04/07/content_3257882.htm The 2011 schedule can be found here: http://en.kunming.cn/index/content/2011-04/22/content_2506441_2.htm