September 9, 2009 is very important to people with cultures who believe in lucky nine....
Not only does the date look good in marketing promotions, but it also represents the last set of repeating, single-digit dates that we'll see for almost a century (until January 1, 2101), or a millennium (mark your calendars for January 1, 3001), depending on how you want to count it.
As the final numeral, the number nine holds special rank. It is associated with forgiveness, compassion and success on the positive side as well as arrogance and self-righteousness on the negative, according to numerologists.
As per the Japanese and Chinese beliefs, it is the opposite.. The Chinese associated number nine with long life and luck like their fearsome nine dragons while the Japanese associated these with badluck and suffering, that's why they avoid even hotel rooms and hospitals.