Chinese New Year vs Li Chun in Bazi
Compare the Lunar New Year calendar boundary with the exact Li Chun boundary used for OpenFate Bazi Year Pillars, without mixing the two conventions.
Overview
Chinese New Year and Li Chun are different calendar events. The official Chinese agricultural calendar begins its lunar year at Lunar New Year, while many Four-Pillars systems—including OpenFate’s calculation contract—change the Bazi Year Pillar at Li Chun. Dates between the two can therefore carry different year labels under the two systems. Neither label is “wrong” outside its own purpose; every result should state which convention it uses.
At a glance
- Chinese New Year
- Start of the lunar calendar year
- Li Chun
- Solar-term boundary used by OpenFate Bazi
- Possible gap
- The events can occur days or weeks apart
- OpenFate result
- Year Pillar changes at exact Li Chun
- Best practice
- Name the convention with the year label
- Boundary
- Do not combine one system’s date with another’s label
The two dates start different kinds of year
Lunar New Year starts month one of the Chinese lunisolar calendar. Its date is determined through the calendar’s month and leap-month structure.
Li Chun is the first solar term in the traditional sequence and is used by many Bazi systems as the Year-Pillar boundary. The events need not coincide.
- Calendar year and Bazi year are labeled purposes.
- Display the source system beside the result.
A date between the events may have two legitimate labels
When Lunar New Year occurs before Li Chun, a civil date in the interval belongs to the new lunar year but retains the previous OpenFate Bazi Year Pillar.
In years when the order differs, the direction of the gap differs as well. The calculation should compare exact instants, not memorized date ranges.
- Compute both events for the year.
- Avoid zodiac-year shortcuts near either boundary.
A reproducible product declares one contract
OpenFate labels its Bazi output as Li-Chun-based. A historical almanac, public holiday page or another school can use Lunar New Year for its own year label.
If two conventions are offered, they should be presented as separate results. Combining the Lunar New Year date with a Li Chun-derived Month Pillar creates an incoherent calculation.
- Version the boundary convention.
- Do not relabel stored reports silently.
The difference does not make one person two destinies
The two labels come from different classification systems. They do not prove that a person’s identity or life changes on one date rather than the other.
Interpretation should follow a consistently calculated chart and preserve uncertainty. Cultural calendar usage deserves explanation without turning it into a universal scientific claim.
- No personality claim from calendar label alone.
- No claim that one convention is universally mandatory.
Sources and editorial basis
- Hong Kong Observatory: The Chinese Agricultural Calendar香港天文台公曆農曆對照表：農曆正月初一與立春分列，兩者並非固定同日An official overview of how the Chinese agricultural calendar combines solar and lunar cycles, including months, leap months, and solar terms.
- Hong Kong Observatory: The 24 Solar Terms香港天文台立春交節資料：立春由太陽位置決定，日期時間每年不同An official astronomical explanation of the 24 solar terms, their 15-degree divisions along the ecliptic, and the alternating major and minor terms.
- Hong Kong Observatory: Heavenly Stems and Earthly Branches香港天文台干支紀年說明：民俗生肖年、農曆年與不同術數界線須先聲明口徑，不能互換An official modern reference for the canonical stem and branch orders, the sexagenary cycle, and calendrical use.