Many people preparing to open a business instinctively reach for their phone, check the almanac, and lock in whatever date is marked "auspicious for opening a business." There is nothing inherently wrong with that — but if you also care about your own BaZi (Four Pillars of Destiny), you will quickly notice that the two systems often disagree. The almanac says today is auspicious for opening; your chart says it is a clash day or a break day. So whose advice do you follow?
What System Does the Almanac Use?
The auspicious and inauspicious markings in the almanac draw from two main frameworks. The first is the Jian Chu Shi Er Shen (建除十二神) — also called the Twelve Jian — a cycle tied to the Heavenly Stems and Earthly Branches of each day, cycling through twelve labels: Jian, Chu, Man, Ping, Ding, Zhi, Po, Wei, Cheng, Shou, Kai, and Bi. The second is a collection of Shen Sha (神煞) — day-specific spirits and deities — calculated from the combination of month and day, including names like Tian De (Heavenly Virtue), Yue De (Monthly Virtue), Tian She (Heavenly Pardon), Tian Huo (Heavenly Fire), and Shou Si Ri (Day of Death).
The "auspicious for opening a business" label typically falls on Cheng (成), Kai (开), and Ding (定) day types, with bonus weight when those days also carry favorable spirits like Tian De or Yue De. Crucially, this system applies universally — it does not distinguish who you are, what your Chinese Zodiac sign is, or what your personal chart looks like. The same recommendation goes out to everyone on the same day.
That is the almanac's core limitation: it describes the "energy" of the day itself, with no crossover to your individual Destiny Chart.
BaZi Date Selection Adds a Personal Dimension
BaZi date selection goes by the formal names Xuan Ze Shu (选择术) or Zao Ming Shu (造命术). The core idea is to align the timing of an event — in this case, a business opening — with the Day Master's natal chart. The year, month, day, and hour of the chosen date generate their own set of stems and branches, and the goal is for those pillars to interact positively with the person's existing chart: supporting the Yong Shen (用神, favorable element), strengthening the Cai Xing (财星, wealth stars), and avoiding clashes or harm to the Day Master.
A concrete example: a Day Master of Jia Wood (甲木) with a relatively weak chart who favors Water and Wood should avoid months when Metal (Jin) energy dominates — such as Shen (申) and You (酉) months — and instead prioritize days like Ren Zi (壬子), Gui Hai (癸亥), Jia Yin (甲寅), or Yi Mao (乙卯). Conversely, a strong Wu Earth (戊土) Day Master who benefits from Metal and Water as outlets would do better targeting days like Geng Shen (庚申) or Xin You (辛酉).
The hour is also part of the calculation. The same calendar day can produce very different effects depending on whether you open at Mao hour (5-7 a.m.) versus Wu hour (11 a.m.-1 p.m.). Professional BaZi date selection works down to the hour — a level of precision the almanac simply cannot offer.
In terms of precision, BaZi date selection is more tailored and more targeted than the almanac.
Each System Has Its Place
This is not a binary choice. The common practice among practitioners is: use the almanac first to filter out the obviously inauspicious days — Shou Si Ri (受死日, Day of Death), Yang Gong Ji (杨公忌, Yang Gong's Taboo Days), and Po (破, Break) days are ones most date-selection practitioners would not touch — and then within the remaining pool of viable days, use BaZi to identify the one that fits the individual best.
The almanac is a coarse filter; BaZi is a fine selection. They are sequential, not competing.
If you can only use one system, my lean is toward BaZi. The reason is straightforward: the almanac's "auspicious for opening" is a statistically general recommendation that holds for most people most of the time; BaZi is calculated specifically for you. A business opening carries real financial weight and ongoing operational pressure — there is no good reason to skip the personal layer of verification when it is available.
The caveat: this assumes you have an accurate BaZi, meaning your birth year, month, day, and hour are all confirmed. If the birth hour is uncertain, the reliability of your chart drops considerably, and in that case you are better off simply relying on the almanac.
Common Misconceptions
Misconception 1: A great almanac day guarantees success.
Almanac auspicious days are relative, not absolute guarantees. A Cheng day for opening a business is a traditional recommendation, but if the day's stems and branches create serious clashes with your chart, it is still not a good fit for you. More importantly, location, operations, and financial preparation matter far more than the specific opening date.
Misconception 2: Pick a good day and ignore the hour.
Many people choose a favorable calendar day but pick the opening time arbitrarily. In rigorous date-selection systems, this leaves the analysis incomplete. The hour pillar is part of the new chart being created; without it, the reading has a gap. Where possible, factor in the hour as well.
Misconception 3: An almanac "inauspicious for opening" is an absolute veto.
Some of the almanac's prohibitions come from inherently weaker day types in the Jian Chu cycle — Po days, Bi days — and others from Shen Sha systems that vary considerably across historical versions. Some versions in popular circulation have drifted significantly from their classical sources. My approach to these is to treat them as reference points, not commandments — especially when BaZi analysis points in a different direction.
Misconception 4: The sooner the opening date, the better.
Traditionally, the favorable arrival of wealth stars and Shi Shen (食神, Food God) producing wealth follows its own cycle and is not necessarily concentrated in any given month. Sometimes pushing back by a few weeks lands you on a date whose stem-branch configuration is genuinely smooth, which is worth more than settling for a merely "acceptable" date out of impatience. When your finances and preparation allow, there is no need to rush the selection.
Back to the original question: which do you consult first? If there is one practical sequence to follow, it is this — use the almanac to eliminate the hard taboo days, then use BaZi among the remaining options to find the date that fits you best, and pin down the hour if you can. The two systems carry different kinds of information; using them as successive filters produces a more reliable result than either one alone.
Articles in this column are for cultural and educational purposes only and do not constitute life advice.