Dabai
In traditional Chinese calendar systems, Dabai is an inauspicious star often paired with or occurring on the same day as Dashi (Great Time), intensifying its negative influence. It was historically avoided for military deployments, business openings, and marriages.
Dabai (Great Defeat) is an inauspicious celestial influence in traditional Chinese almanacs. It is frequently mentioned alongside or occurs on the same day as Dashi (Great Time), and its malevolence is considered even stronger. In old customs, undertaking important affairs on this day was believed to invite severe setbacks. Therefore, besides the prohibitions shared with Dashi—against launching military campaigns and conducting marriages—it was also particularly avoided for opening new businesses or commencing commercial ventures, out of fear that such enterprises would fail utterly. This extension of taboos to include economic activities reflects the risk-averse mindset of an agrarian society seeking to prevent financial losses.