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Wedding day to avoid San Niang Sha day

KofiBean
Question Date: 19/7/2025
Dear Master,

I have another question.

What is 三娘煞 san ninag sha in wedding dates?

Regards,

Peter Yap
Date Answered: 24/7/2025 

三娘煞 San Niang Sha is a traditional Chinese folk belief related to marriage taboos, particularly about choosing wedding dates


It's considered an inauspicious force killing Qi (煞) associated with certain days of the lunar month, and it’s believed to bring bad luck to brides and marriages if violated.

三娘 = "Third Lady" (a mythological figure or spirit) and 煞 = "Sha" = evil force, curse, inauspicious energy.

This folk tale is about "San Niang" was said to be a maid or goddess who wasn't allowed to marry or had an unhappy fate in love. Out of resentment or bitterness, she vowed to sabotage weddings held on certain days, especially for women.

Each lunar month has specific days called 三娘煞日 (San Niang Sha Days) that are considered bad for weddings.


While the exact dates may vary by region or almanac, a commonly accepted pattern is

They are lunar days

3th day 初三、

7th day 初七、

13th day 十三、

18th day 十八,

22nd day 廿二 and

27th 廿七 day

There are fake and real San Niang Sha. The so called real must fulfill the following conditions.

3rd day must be GengWu 庚午 day,

7th day must be XinWei 辛未 day,

13th day must be WuShen 戊申 day,

18th must be JiYou 己酉 day,

22th day must be BingWu 丙午 day,

27th day must be DingWei 丁未 day

In old time, it's considered bad luck, especially for marriage and engagement.

- Believed to bring relationship issues, unhappiness, separation, or even widowhood.

- Some avoid it for important ceremonies involving women, like hairpin ceremonies or moving into a marital home.

In modern times:

- It's less known among younger generations.

- Still followed by people who are superstitious or deeply observe Chinese customs.

So who started this and should you follow?


The concept of 三娘煞 (San Niang Sha), like many traditional Chinese taboos and metaphysical beliefs, does not have a clearly documented origin or known single "founder". It comes from folk beliefs, myth, and the evolution of Chinese metaphysical culture, rather than classical or canonical BaZi theory.
The concept does not appear in the core BaZi classics like:

《滴天髓》Di Tian Sui

《子平真诠》Zi Ping Zhen Quan

《三命通会》San Ming Tong Hui

Instead, it's found in folk almanacs, passed through oral tradition, and sometimes included in the Tong Shu (通书), which blends astrology, calendar systems, and superstition.

Always better to check with your BaZi when choosing a wedding date


Should you follow it? Only with context. If you’re choosing a wedding date, this is one of the elements checked in a Tong Shu (Chinese Almanac) or during 择日 (date selection) based on BaZi.

My advice is it is best to consult your BaZi first when choosing a wedding date, especially if you want a date that aligns with personal destiny and long-term harmony.

Warmest Regards,

Thank you for reading our BaZi and Feng Shui: Questions and Answers: "Wedding day to avoid San Niang Sha day"

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