Bazi Charts for Overseas Births
Calculate an overseas Bazi birth from the recorded local date, place and historical time zone without manually converting it to Beijing time.
Overview
For an overseas birth, begin with the date and clock time recorded at the birth location. Resolve that location’s historical IANA time zone to a definite instant, then apply the declared solar-term, true-solar-time and day-boundary rules. Do not first rewrite the birth as Beijing time and then treat that converted clock as local. Half-hour and quarter-hour zones, daylight-saving transitions and International Date Line differences are ordinary civil-time data, not exceptions to the Four-Pillars cycle.
At a glance
- Starting record
- Birthplace local date and clock time
- Zone source
- Historical IANA location rule
- Supported offsets
- Whole-hour, half-hour and quarter-hour zones
- Date risk
- UTC conversion and International Date Line
- Wrong shortcut
- Replacing the local input with Beijing clock time
- Same engine
- One pillar contract for every country
Preserve the date and time as recorded locally
A birth certificate or family record normally uses the civil clock in effect at the birthplace. Store that source value before any conversion.
Manually adding or subtracting hours can lose the local date, daylight-saving occurrence and provenance. The zone library should perform the conversion.
- Keep the original local timestamp.
- Do not overwrite it with a converted display time.
International zones are not limited to whole hours
Some locations use thirty- or forty-five-minute offsets, and historical rules may differ from today. The named IANA zone resolves those details for the birth date.
Near clock transitions or the International Date Line, the same wall-clock label may be invalid, repeated or on a different UTC date. These cases need explicit validation.
- Accept non-integer UTC offsets.
- Flag gaps and repeated times.
After normalization, apply the same Bazi contract
The normalized instant is compared with exact solar terms for the Year and Month Pillars. Any selected solar-time correction uses the birthplace longitude; the Day and Hour Pillars use the saved day-boundary mode.
The procedure does not move the person to China conceptually. It uses one reproducible calculation policy across locations.
- Use birthplace coordinates for solar correction.
- Keep every convention visible.
Overseas birth does not create a special destiny category
Country of birth does not add a Five Phase, Ten God or fortune score. Cultural context may shape a person’s life, but it is not inferred from the time-zone conversion.
If place or time records conflict, present candidate charts. Do not choose a location or offset because it produces a preferred interpretation.
- No national stereotype in the reading.
- No result-shopping between time zones.
Sources and editorial basis
- IANA Time Zone DatabaseIANA Time Zone Database 支援整點、半小時、四十五分鐘偏移、國際換日線及各地歷史日光節約時間，不限於中國時制The maintained reference for historical local-time rules, UTC offsets, and daylight-saving transitions by location.
- U.S. Naval Observatory: The Equation of Time美國海軍天文台地方太陽時說明：太陽時修正使用事件所在地經度，不把海外出生地改標為北京地方時間An official astronomical explanation of apparent solar time, mean solar time, longitude offsets, and the equation of time.
- OpenFate Editorial Methodology產品保存海外出生證明所載當地日期時間，先還原確定瞬間，再以同一節氣、日界與干支引擎計算所有國家OpenFate separates deterministic chart calculation, traditional interpretation, and modern editorial explanation.