The 15-16 May rocket festival near Chiang Rai is detailed below. No specific times for events are given.
On Wednesday, 15 May and Thursday, 16 May, there will be a rocket festival at Dong Mahawan. The festival will be held at the sports field.
1. Rocket beauty contest
2. Parade of rockets
3. Choose the rocket man and woman
4. Two inch and three inch rocket teams compete
5. Traditional songs, dancing, celebration
Dong Mahawan Sports Field is located at the green arrow marker on this map- http://goo.gl/maps/Aae7a
Approximate grid coordinates are: 20.02350 and 100.01357
Google Street View of the entrance to the sports field here- http://goo.gl/maps/p8Vun