calcchinesecalendar 2.6.4b3

Native Python bindings for the CalcChineseCalendar lunar ephemeris, astronomy, and calendar engine.

calcchinesecalendar

calcchinesecalendar packages the lunar engine as a native Python extension for Chinese calendar, almanac, and astronomy computations.

It is intended for direct use from Python code and for installation from PyPI.

The upstream C++ repository and the full reference documentation are available at:

• GitHub: https://github.com/lzray-universe/CalcChineseCalendar/

If you need the full CLI reference, C++ API, C API, i18n details, repository layout, or release artifacts, use the GitHub repository as the primary reference.

Installation

pip install calcchinesecalendar

Quick start

import calcchinesecalendar as ccc

print(ccc.version())

data = ccc.day("@series", "2025-06-01")
print(data["data"]["phase_name"])

ganzhi = ccc.ganzhi("@series", "2025-09-07")
print(ganzhi["data"]["day"]["text"])

Using BSP ephemerides

The first argument of the public APIs is the ephemeris selector:

• use @series to force the built-in VSOP87A + ELPMPP02 fallback
• pass a BSP file path such as de442.bsp to use JPL DE ephemerides

Example:

import calcchinesecalendar as ccc

data = ccc.day("de442.bsp", "2025-06-01")
print(data["data"]["phase_name"])

Public API overview

The package exposes:

• native core APIs such as core_day, ganzhi, ganzhi_month, and calc_eot
• high-level helpers such as day, monthview, at, convert, search, eclipse, festival, almanac, and info
• raw run and run_json access for advanced command-style use
• a Lunar client class for shared defaults such as lang and eclipse_method

High-level helper example

import calcchinesecalendar as ccc

result = ccc.search(
    "@series",
    "next full_moon",
    from_time="2025-06-01T00:00:00+08:00",
    count=2,
)

for item in result["data"]["items"]:
    print(item["time"]["iso"])

Lunar client example

import calcchinesecalendar as ccc

lunar = ccc.Lunar(lang="en", eclipse_method="fast")
result = lunar.day("@series", "2025-06-01")
print(result["data"]["phase_name"])

Notes

• Python package name: calcchinesecalendar
• Import name: calcchinesecalendar
• Python 3.9 or newer is required
• The package bundles the native extension; a compiler is not required for normal wheel installation

For the full CLI, C++ API, C API, i18n documentation, and repository-level usage notes, see the GitHub C++ repository:

• https://github.com/lzray-universe/CalcChineseCalendar/