12 Day OfficersThe definitive Jian Chu guide
A professional standard for using 建除十二神 to time business and relationship actions—grounded in solar months, the sexagenary day, and a repeatable decision process.
The 30-second foundation
A fixed cycle assigned to every day.
建 除 滿 平 定 執 破 危 成 收 開 閉
The twelve Officers repeat in this order. The day’s position is calculated by comparing its Earthly Branch with the solar month’s Establishment Branch.
Match timing to action
The method does not force an outcome. It helps you choose a day whose operating quality supports the specific action you intend to take.
The governing rule
One difference determines the Officer.
When the day Branch equals the month Branch, the result is 建—Establish. Each additional step advances through the fixed twelve-Officer sequence.
Officer = (dayBranchIndex − monthBranchIndex) mod 12- Month Branch · 月建: determined from solar-term longitude in twelve 30° segments, beginning with 寅.
- Day Branch · 日支: determined from the 60-day sexagenary cycle, with optional Zi-hour day start.
- Mapping: zero difference equals 建; values 1–11 follow the fixed order through 閉.
Solar month vs lunar month
The Sun sets the month boundary.
For the 12 Day Officers, 月建 follows solar terms—not the lunar calendar month.
Solar-term month
The Sun’s apparent ecliptic longitude, λ⊙, places the moment within a 30° solar segment. This creates observable, reproducible month boundaries without leap-month ambiguity.
Lunar-calendar month
Lunar months follow Moon phases and can contain leap months. They serve other calendrical purposes but are not the month basis used in this Officer calculation.
Professional advantage: solar boundaries reduce ambiguity, allow astronomical auditing near a transition, and align the calculation with classical date-selection practice.
Meaning & moves
The complete working reference.
Start with the exact action. Then use the table to find the Officer whose operating quality best supports it.
| Officer | Plain English | Business plays | Relationship plays | Avoid |
|---|---|---|---|---|
| 建Establish | Begin and frame | First contact, filings, kickoffs, claim names or handles. | Light outreach, seed an apology, establish expectations. | Irreversible commitments; save them for Settle or Success. |
| 除Remove | Clear and release | Cut costs, clean data, end bad projects, unsubscribe. | End stale fights, detox routines, declutter shared space. | New launches. |
| 滿Full | Harvest fullness | Collect benefits, redeem loyalty, finalize payouts. | Celebrate wins and wrap loose ends. | New initiatives; momentum is consolidating. |
| 平Level | Restore parity | Normalize terms, renegotiate balance, perform maintenance. | Reset routines and agree simple ground rules. | High-stakes gambits. |
| 定Settle | Confirm and commit | Lock pricing, sign contracts, finalize specifications. | Make concrete commitments and define timelines. | Open-ended exploration. |
| 執Hold | Enforce and execute | Apply SOPs, push compliance, roll out playbooks. | Hold boundaries and follow through. | Soft or ambiguous asks. |
| 破Break | Disrupt and reset | Terminate vendors, restructure, litigate, hard reset. | Cut toxic loops; confront sharply when necessary. | Fragile alliances you still need. |
| 危Danger | Assess exposure | Run red-team reviews, stress tests, and fail-safes. | Discuss risks calmly; examine weak points. | Big launches and ultimatums. |
| 成Success | Complete and prove | Ship, publish results, showcase case studies. | Celebrate, reveal outcomes, make it public. | Long negotiations; conduct them earlier. |
| 收Receive | Collect and reconcile | Invoices, collections, receivables, reconciliation. | Ask for returns or favors; complete exchanges. | Bold new bets. |
| 開Open | Invite and expand | Announcements, PR, recruitment kickoff. | Introduce ideas and invite collaboration. | Closures; keep doors open. |
| 閉Close | Seal and contain | Shut down, archive, audit, restrict access. | Close chapters cleanly and document boundaries. | Beginnings. |
A common question
Why can the same Officer appear twice?
At a solar-month boundary, the day Branch and month Branch may both advance by one. Their difference remains unchanged:
(day + 1) − (month + 1) = day − month
The resulting Officer is therefore identical on consecutive days. This is mathematically consistent and not a calculator error.
Use it in ten seconds
A fast, disciplined workflow.
Run the calculator
Select the local date and time. Keep Zi-hour enabled if your practice changes the day at 23:00.
Name the action
Distinguish outreach, negotiation, signature, launch, collection, restructuring, and closure.
Use the Officer’s edge
Match the action to the reference table. For higher stakes, add personal and seasonal context.
Stacking signals
Add context when the stakes rise.
Match the style
Relate the Officer’s action mode to the day pillar’s temperament—for example, using Metal-day clarity for crisp decisions.
Respect solar bias
Use seasonal quality for tone: opening and growth align differently from containment and dormancy.
Verify the field
Account for preparation, consent, deadlines, people, financial exposure, and practical execution.
Quick FAQ
Technical questions, clear answers.
Do you support Zi-hour day start?
Yes. Enable it when your system changes the metaphysical day at 23:00 local time.
Why use solar months?
They follow the Sun’s actual position, creating clean boundaries without lunar leap-month ambiguity.
How precise is the calculator?
It uses astronomical λ⊙ for the month Branch, the sexagenary cycle for the day Branch, and the plugin’s configured almanac calibration.
Related resources
From theory to daily use.
Your next move
Check the Officer before you act.
Calculate today or a future date, identify the exact action you intend to take, and apply the Officer’s operating quality with context and discipline.