Un'goro Madness is a micro-holiday added with Patch 7.1.5 that took place on March 17 - 19. It was planned for August 10 - 12, but was apparently moved up to coincide with the similar named Hearthstone: Heroes of Warcraft expansion called "Journey to Un'Goro" which will be released April 6, 2017.
Official preview description Edit
Patch changes Edit
- Patch 7.1.5 (10-Jan-2017): Added.
See also Edit