| --- |
| license: mit |
| language: |
| - zh |
| pretty_name: Chinese Calendar Data |
| tags: |
| - astronomy |
| - calendar |
| - chinese-calendar |
| - lunar-calendar |
| - almanac |
| - ephemeris |
| configs: |
| - config_name: days |
| data_files: data/v1/days/*.parquet |
| - config_name: calendar_months |
| data_files: data/v1/calendar_months/*.parquet |
| - config_name: calendar_events |
| data_files: data/v1/calendar_events/*.parquet |
| - config_name: astro_months |
| data_files: data/v1/astro_months/*.parquet |
| - config_name: astro_events |
| data_files: data/v1/astro_events/*.parquet |
| - config_name: eclipse_years |
| data_files: data/v1/eclipse_years/*.parquet |
| - config_name: solar_eclipses |
| data_files: data/v1/solar_eclipses/*.parquet |
| - config_name: lunar_eclipses |
| data_files: data/v1/lunar_eclipses/*.parquet |
| --- |
| |
| # Chinese Calendar Data |
|
|
| A lossless, versioned Parquet publication of Chinese calendar, Huangli, lunar |
| phase, solar-term, eclipse, and astronomical-event data generated by |
| CalcChineseCalendar (CCC). |
|
|
| The dataset title intentionally does not contain a year range. Release `v1` |
| covers civil years **1950 through 17000**, inclusive. Civil dates and times are |
| stored as numeric columns and never require JavaScript `Date`. |
|
|
| ## Release facts |
|
|
| - Civil timezone: UTC+08:00 |
| - Lunar day boundary timezone: UTC+08:00 |
| - Huangli longitude: 120 degrees east |
| - Ephemeris: JPL DE441, with exact source hashes in `metadata/v1/manifest.json` |
| - Huangli profiles: `folk`, `ziping`, `purple`, `xieji` |
| - Far-future civil dates use CCC's documented delta-T extrapolation |
| - Source web-data validation: 15,051/15,051 years passed, zero failed years |
|
|
| ## Tables |
|
|
| | Config | Row meaning | Important contents | |
| |---|---|---| |
| | `days` | one civil day | Gregorian/lunar date, festivals, daily Moon state, four Huangli profiles, event references | |
| | `calendar_months` | one civil month | month metadata and source event/day counts | |
| | `calendar_events` | one solar term or exact four-phase event | civil second, JD TDB/UTC, original time strings | |
| | `astro_months` | one civil month | observer metadata and source event count | |
| | `astro_events` | one astronomy event | typed common event coordinates plus lossless event-specific payload | |
| | `eclipse_years` | one civil year | date-assignment and Greatest Eclipse metadata | |
| | `solar_eclipses` | one solar eclipse | assignment event plus lossless full technical data | |
| | `lunar_eclipses` | one lunar eclipse | assignment event plus lossless full technical data | |
|
|
| Small release metadata remains JSON/Markdown because it is configuration and |
| documentation, not tabular data. All high-volume records are Parquet. |
|
|
| Complex objects that do not yet have one stable cross-kind Arrow schema are |
| stored as canonical UTF-8 JSON in `binary` columns. This is deliberate: it |
| preserves missing versus null, list order, double precision, and all |
| source-defined fields. `metadata/v1/PARQUET_FORMAT.md` documents the exact |
| round-trip rules. |
|
|
| ## Provenance and validation |
|
|
| The authoritative source manifest, schema, dictionaries, SHA-256 list, and |
| validation report are published under `metadata/v1/`. Every published Parquet |
| file was read back and checked for file hash, schema, row count, canonical |
| payload parsing, and lossless source-object reconstruction. |
|
|
| ## License |
|
|
| MIT. See `LICENSE`. JPL DE441 is identified as scientific input provenance; |
| the BSP kernels themselves are not redistributed in this Dataset repository. |
|
|
