---
title: "Gregorian to Lunar Date"
method: POST
path: "/chinese/lunar-date"
tags: ["Chinese: Zodiac & Feng Shui"]
---

# Gregorian to Lunar Date

`POST /chinese/lunar-date`

Chinese lunar month and day for a Gregorian date, including leap-month detection, plus the Chinese New Year of that year.

## Request body

- ChineseLunarDateInput
  - `date` string, required
  - `time` string
  - `timezoneOffset` number, nullable — Hours from UTC at the given moment, not minutes. Fractional zones are hours too: 5.5 for India, 5.75 for Nepal, -3.5 for Newfoundland. Defaults to 0, meaning UTC.

## Response `200`

Successful calculation

- object
  - `ok` boolean
  - `data` object
    - `gregorianDate` string, nullable
    - `lunar` object, nullable
      - `month` number, nullable
      - `isLeapMonth` boolean, nullable
      - `day` number, nullable
      - `monthStart` string, nullable
      - `label` string, nullable
    - `chineseNewYear` string, nullable

## Other responses

- `400` — Validation error
- `401` — Missing or invalid API key

## Changes

- **2026-08-22** `5a17388652f3` — 1 breaking, 2 info
  - added the new required request property `date`
  - added the new optional request property `time`
  - added the new optional request property `timezoneOffset`
- **2026-08-14** `994755209cea` — 2 info
  - api tag `Chinese: Zodiac & Feng Shui` added
  - api tag `Chinese — Zodiac & Feng Shui` removed

[Change history](https://skmtc.dev/astroway/apis/astroway-calculation-api/changes/chinese/lunar-date/post.md)

---

[API](https://skmtc.dev/astroway/apis/astroway-calculation-api.md) · [All operations](https://skmtc.dev/astroway/apis/astroway-calculation-api/llms.txt) · [OpenAPI document](https://skmtc-service-production.skmtc.workers.dev/v1/apis/astroway/astroway-calculation-api/revisions/8ab5a768b521/schema)