About Jeombom
Jeombom is a Korean saju (Four Pillars) service: enter just your date of birth and it draws the eight characters of your Four Pillars and calculates your Five Elements, Ten Gods, Useful God, 10-year luck cycles, and yearly luck. Instead of difficult Chinese characters, we explain it in plain language, and for those who want to go deeper, Expert Mode shows the evidence — which position we looked at and why we read it that way.
What can I see?
- My SajuFour Pillars, Day Master, Five Elements balance, Ten GodsFree
- Today’s Fortune · This Week’s FortuneScores and good days based on daily energyFree
- Saju CompatibilityDay Masters, Day Branches, complementary Useful GodsFree
- 10-Year Luck Cycles · 2027 New Year FortuneThe big picture and the year aheadFree
- Date Picking · Dream Interpretation · Jeombom ReadingsFinding auspicious days, AI dream interpretation and readingsFree
- 4 In-Depth Reports · Reading CreditsDetailed interpretations, written out at length in prose you can actually readPaid
Paid products are one-time purchases, not subscriptions. Paid Report Guide · Refund Policy
What are the calculations based on?
Our saju calendar follows Korea Astronomy and Space Science Institute (KASI) solar term data. When setting the Hour Pillar, we correct for true solar time — Korean Standard Time is based on 135°E, but the central longitude of the Korean Peninsula is about 127.5°E, so we subtract 30 minutes plus the equation of time, which varies by date (about 14–44 minutes in total, depending on the date), to convert to actual solar time.
We also account for 12 daylight saving time periods (1948–1951, 1955–1960, 1987–1988) and the period from Mar 21, 1954 to Aug 9, 1961, when Korean Standard Time was based on 127.5°E. If you were born in these periods, your Hour Pillar would be off by one slot without correction. We take input in the solar calendar (if you only know your lunar birthday, please convert it to solar). Because the Month Pillar is set by solar terms, the result is the same whether a given day is expressed in the solar or lunar calendar.
Check whether my Hour Pillar is right · Korean Standard Time records · Saju Calendar API
How we handle your personal information
What about the date of birth you enter? If you don’t log in, it stays only in this device’s browser . Saju calculations also happen inside your browser. If you log in with Kakao, your saju and compatibility partners are saved to your account (Jeombom’s servers) so you can pick up on other devices. When you request a reading, your saju summary and question pass through our server to generate the answer, but the conversation is not stored.
Company Information
| Service name | Jeombom (jeombom.kr) |
|---|---|
| Company | X-ON Inc. |
| CEO | Kim Ho |
| Business registration no. | 367-81-03966 Verify business information |
| Mail-order business registration | No. 2026-Seoul Gangnam-03166 |
| Address | 4F, 49 Hakdong-ro 20-gil, Gangnam-gu, Seoul, Republic of Korea |
| Customer center | 070-4578-8645 Business days 10:00–18:00 KST (excluding lunch 12:00–13:00) |
| contact@x-on.kr | |
| Chief Privacy Officer | Kim Ho |
Jeombom’s fortune results are entertainment content and do not replace professional judgment in medical, legal, investment, or similar matters.
What does Jeombom base its saju calculations on?
Jeombom is a Korean saju service that builds its saju calendar from Korea Astronomy and Space Science Institute (KASI) solar term data and corrects your birth time to true solar time to calculate the eight characters of your saju.
| Item | Jeombom standard |
|---|---|
| Solar terms · saju calendar | Korea Astronomy and Space Science Institute (KASI) solar term data |
| Birth time | True solar time correction — subtracts the 30-minute difference between standard time (135°E) and the center of the Korean Peninsula (about 127.5°E), plus the equation of time, which varies by date |
| Daylight saving time | 12 periods in 1948–1951, 1955–1960, and 1987–1988 reflected |
| Former standard time | Period from Mar 21, 1954 to Aug 9, 1961 at 127.5°E reflected |
| Input | Solar date of birth (convert a lunar birthday to solar before entering) |
Why correct for true solar time?
Because clock time and actual solar time can differ by around 30 minutes. If you were born during a daylight saving or former standard time period, your Hour Pillar may be off by one slot without correction. Detailed records are in Korean Standard Time records and Hour Pillar Check. For what to look for when choosing a free saju reading, see How to choose a free saju reading.
Where can I find the sources behind Jeombom’s readings?
- Korea Law Information Center — Korea’s Act on Standard Time
- National Institute of Korean Language, Standard Korean Dictionary — meaning of “saju palja”
- Wikipedia — Four Pillars of Destiny
- Wikipedia — Time in South Korea (daylight saving time history)
- Korea Astronomy and Space Science Institute, Astronomical Knowledge — Monthly solar/lunar calendar
Can I take the fortune results at face value?
Jeombom’s fortune results are entertainment content for fun and reference. For important decisions about health, law, or investments, please consult a professional in that field.