2008 Summer Olympics opening ceremony
The opening ceremony of the 2008 Summer Olympics was held at the Beijing National Stadium, also known as the Bird's Nest. It began at 20:00 (8:00 PM) China Standard Time (UTC+08:00), on 8 August 2008, due to the significance of the number 8, which is considered to be auspicious and is furthermore associated with prosperity and confidence in Chinese culture.
Source: Wikipedia — 2008 Summer Olympics opening ceremony (CC BY-SA 4.0)