The Beijing Olympics started at 8 pm on August 8th, 2008. Number 8 in Chinese superstition means “prosperity” and is auspicious. And we all know that superstition on numbers is one of the most classic kind of superstition. And the starting time of the Olympics was decided by the central government and of course of the CCP.
First of all, Traditional Chinese don't prioritize individual numbers themselves superstitiously. Numbers are attached to things and time. For example, if a person's mother or father died on the date of August 8th (八月八日), this person will NOT IN A MILLION YEARS treat the number 8 as a lucky number. "8" will become associated with the death anniversary (忌日) of his/her parent, and thus became a symbol of remembrance and mourning. This is because Filial Piety (I use capital letters because this is pretty much a religious principle in China) is held in much higher regard than some numbers.
Secondly, traditional Chinese superstition has two interesting principle:
1. Yin-yang duality,
2. Balance;
Yin-yang duality means that every revered number or concept of element is both good and bad.
For example, in some traditions in China, the number 7 is a sacred number, as this is the number of celestial elements: Sun (日), Moon (月), Gold star (Venus, 金星), Wood Star (Jupiter, 木星), Water Star (Mercury, 水星), Fire Star (Mars, 火星), Earth Star (Saturn, 土星). This is known as 七曜(Seven Stars),also known as 七政, 七纬 or 七耀. This is still used in Japanese language for weekdays today.
The number 7, according to Han dynasty philologist Xu Shen (許慎,30 - 148 CE), is the "Standard/rectification of Yang" (七,陽之正也).
One other example is "七夕", pronounced "Qixi" in mandarin. This is known as the "Valentine's day of the East", pronounced "Tanabata" in Japanese, and is supposed to be the 7th day of July in either the Traditional Chinese calendar (or in the Gregorian Calendar in Japan after the Meiji Restoration). Actually, in the original story, the actual day of the annual union of the human cowherd and the celestial weaver girl was never specifically mentioned. According to the Song dynasty Leishu Encyclopedia 《太平御覽》, people consider the day July 7th (七月七日) as a very lucky and good day, therefore they assigned this day as the day when the Cowherd gets to meet the Weaver Girl every year.
But the number 7 is also associated with death and mourning (which according to the peasant-talking Hong Kongers is automatically bad, because those uncultured peasant HKers considers everything associated with death as bad). When a person passes away, one of his/her immediate relative needs to be chosen to be the guardian of his/her soul for 7 days. This is called “頭七”. This tradition is actually a part of a very complex mourning rites (go search for 做七 for more detail). But the entire rites incorporates a lot of number 7 in its structure. The original reason is actually because number 7 is a sacred and power number, and only the utilization of this number grants enough power to comfort the soul and lay it to rest. But again, according to HK peasants, everything associated with death is BAD. So 7 must be a BAD number, OMG!