Whilst tidying up and publishing yesterday's post I saw this in the text, I decided to extract it and publish it on it's own.
2013 Mists of Pandaria Midsummer Fire Festival
There only 2 things stopping you completing this below level 90.
1) You need to be at level 89 to do Ahune
2) Assuming you meet criteria above you shouldn't have any problem doing the zones except you have to do the White Tiger quests with Anduin to open Vale of Eternal Blossoms.
Edit: 21/02/2014: Has that changed it's name to Vale of Eternal Sorrows now? Can't be bothered to check!