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Si Fei Ri (四废日)

Function

Si Fei Ri (四废日) is one of the shensha (神煞) in Bazi (八字) astrology, referring to days in the four seasons—spring, summer, autumn, and winter—where the Heavenly Stems (天干) and Earthly Branches (地支) form an opposing structure to the seasonal dominant qi. People born on these days typically lack individuality and find it difficult to achieve significant success in their careers, often feeling like their talents are unrecognized or leading an ordinary life. Those born on Si Fei Ri may start things without finishing them, making it hard to succeed, and should pay special attention to health issues.

Method of Identification

The method to identify Si Fei Ri is based on the opposing structure between the seasonal dominant qi and the Heavenly Stems and Earthly Branches. The specific days are as follows:

  • Spring: Geng Shen (庚申), Xin You (辛酉)
  • Summer: Ren Zi (壬子), Gui Hai (癸亥)
  • Autumn: Jia Yin (甲寅), Yi Mao (乙卯)
  • Winter: Bing Wu (丙午), Ding Si (丁巳)

These dates represent the conflict between metal, wood, water, and fire in the seasons, rendering the corresponding Heavenly Stems and Earthly Branches powerless, thereby affecting the personal fortune and career development of the individual.

The concept of Si Fei Ri originates from the changes in seasons and the mutual generation and overcoming of the Five Elements (五行). The dominant qi of the four seasons and the corresponding Heavenly Stems and Earthly Branches form a 180-degree opposing structure, making these days "waste days." People born on these days may have an ordinary personality and lack outstanding performance. The ancients believed that individuals born on Si Fei Ri often face suppression from external environments, lack opportunities, and find it difficult to achieve significant accomplishments in their lifetime.

FAQ

What is Si Fei Ri in Bazi astrology?

Si Fei Ri in Bazi astrology refers to specific days known as “Four Waste Days,” when the Heavenly Stems and Earthly Branches directly oppose the seasonal qi. These days are considered inauspicious in Chinese metaphysics and are believed to impact an individual’s fate, career, and fortune. People born on Si Fei Ri may experience challenges such as lack of recognition, obstacles in career advancement, and suppressed personal potential due to elemental imbalance. Understanding Si Fei Ri is important for accurate Bazi analysis and for recognizing influential shensha in a Bazi chart.

How to identify Si Fei Ri dates in a Bazi chart?

To identify Si Fei Ri dates in a Bazi chart, examine the day pillar and match it with the specific Heavenly Stem and Earthly Branch combinations for each season. In spring, look for Geng Shen or Xin You; in summer, Ren Zi or Gui Hai; in autumn, Jia Yin or Yi Mao; and in winter, Bing Wu or Ding Si. If your birth day matches any of these, it falls on a Si Fei Ri, indicating the presence of this shensha in your Bazi chart. Accurate identification helps in understanding its influence on personal destiny.

Why is Si Fei Ri considered unlucky in Chinese astrology?

Si Fei Ri is considered unlucky in Chinese astrology because the Heavenly Stems and Earthly Branches on these days clash with the season’s dominant qi, creating disharmony. This elemental opposition is thought to weaken personal fortune, making it difficult for individuals to achieve recognition, career success, or fulfill important goals. The concept draws from the Five Elements theory, highlighting how imbalance on Si Fei Ri can lead to less favorable life circumstances and average achievements.

What are the effects of being born on a Si Fei Ri day?

Being born on a Si Fei Ri day in Bazi astrology is traditionally linked to challenges such as difficulty expressing individuality, lack of recognition, and obstacles in career progress. Individuals may often start projects but struggle to complete them, leading to a more ordinary life path. Potential health issues are also noted. These effects are attributed to the elemental opposition present on Si Fei Ri, which can suppress personal strengths and talents according to Chinese metaphysical principles.

When do Si Fei Ri dates occur in the Chinese calendar?

Si Fei Ri dates occur on specific days in each of the four seasons according to the traditional Chinese calendar. In spring, these dates are Geng Shen and Xin You; in summer, Ren Zi and Gui Hai; in autumn, Jia Yin and Yi Mao; and in winter, Bing Wu and Ding Si. Each combination reflects a seasonal opposition between Heavenly Stems and Earthly Branches, marking the Four Waste Days that are significant in Bazi astrology for their impact on fate and fortune.