Nominal Age & 9 Annual Stars Calculator
Calculate nominal age, identify 9 annual ruling stars (Sao Chieu Menh), and earthly terms (Han).
Input Parameters
Live Result
Astrological Profile for Year 2026
Used for traditional rites, wedding & construction
Official age per civil registration records
Details
Steps
Compute completed calendar years: Current Year - Birth Year
Add 1 nominal gestational year (Traditional Vietnamese customs)
Lookup Annual Astrological Star (Cuu Dieu Nien Han)
Quick Answer & Understanding Your Result
The 9 Annual Ruling Stars (Sao Cuu Dieu) system assigns one of 9 celestial ruling stars and 8 earthly terms (Han) to your life each year based on your nominal age and biological sex.
The 9 Annual Ruling Stars (Sao Cuu Dieu)
- Auspicious Stars (Cat Tinh):
- Thai Duong (Sun): Supreme fortune, wealth, career expansion (especially for males).
- Thai Am (Moon): Joyful events, wealth, love, harmony (especially for females in September).
- Moc Duc (Jupiter): Good relationships, smooth business, health blessings.
- Inauspicious Stars (Hung Tinh - Require Caution):
- La Hau (North Lunar Node): Legal troubles, verbal disputes, eye illnesses (heavier for males).
- Ke Do (South Lunar Node): Emotional sorrow, family turbulence (heavier for females).
- Thai Bach (Venus): Sudden financial loss, fatigue ('Thai Bach sach bach cua nha').
- Van Han (Mars): Slander, minor illnesses in April/August.
- Neutral Stars (Binh Thuong): Tho Tu (Saturn) and Thuy Dieu (Mercury).
Enter your birth year and target evaluation year above to discover your ruling star and annual earthly term (Han).
Formula & Calculation Logic
Mathematical FormulaClassical Nine Planetary Deities (Cuu Dieu) age-progression tables.
Step-by-Step Guide
Enter Birth Year and Sex
Input birth year and biological sex.
Select Evaluation Year
Choose the target year you want to evaluate.
View Ruling Star (Sao Chieu Menh)
Identify whether your star is Auspicious (Good), Neutral, or Inauspicious (Bad).
View Earthly Term (Han)
Review associated earthly term (Huynh Tuyen, Tam Kheo, Ngu Mo, Thien Tinh, Toan Tan...).
Worked Examples Table
| Example | Input Values | Calculated Result | Explanation |
|---|---|---|---|
| Male Born 1990 in 2024 (Age 35) | Male age 35 receives the beneficial Thai Am lunar blessing star. | ||
| Female Born 1990 in 2024 (Age 35) | Female age 35 encounters Thai Bach requiring prudent budgeting. |
Frequently Asked Questions
Evidence-Based Methodology & Authoritative References
Vietnam Academy of Social Sciences - Folk Astrology and Beliefs
Institute of Han-Nom Studies
Standard: ISO / W3C / IETF Authoritative Domain Standard
Formula: Male Star Index = Formatted cycle from 10 to 90 years
Last Reviewed: August 21, 2026
Primary Source: Vietnam Academy of Social Sciences - Folk Astrology and Beliefs
Reference Document: Institute of Han-Nom Studies
Computation Privacy: 100% client-side 0ms computation, zero data retention
Traditional calendar, cultural, and spiritual calculations are derived from Eastern cultural folk traditions and historical reference literature for personal research and cultural appreciation.
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Calculated results are modeled based on standard scientific and mathematical formulas. Please verify with domain-specific technical documentation for specialized applications.