Hong Kong Observatory date tables

Gregorian–lunar calendar lookup

Find the published lunar date for a Gregorian day, or look up the Gregorian date from the listed lunar year, month and day.

This edition covers 2023-01-01 through 2028-12-31: 2,192 published days. Lunar values remain in traditional Chinese. Dates beyond this range are unavailable.

Look up a date

Choose a date, then run the lookup.

Lookup and CSV generation run in your browser. Your chosen dates are not sent to a server or added to the page address. Editing an input clears the previous result and download.

Published dates, with leap months preserved

The tool looks up Hong Kong Observatory’s dated tables. It does not estimate a lunar date from a formula or your browser’s calendar settings. The Gregorian date is used as a calendar day; it is not converted from an instant in another time zone.

A leap month has its own identity. For example, 癸卯年二月初一 and 癸卯年閏二月初一 are different dates. Reverse lookup uses a year, the exact month label and a day, and is limited to combinations actually present in this six-year edition.

The month view and CSV show the Gregorian month containing the result. They are date-conversion tables, not public-holiday schedules, solar-term tables or a statement about observance in another jurisdiction.

Official source and attribution

Source: Hong Kong Observatory, Government of the Hong Kong Special Administrative Region, via DATA.GOV.HK. Data intellectual property belongs to the Government and relevant organisations. Reused under the DATA.GOV.HK Terms and Conditions. DATA.GOV.HK dataset · Terms and Conditions.

Source files checked . Contifield is independent; the Government and Hong Kong Observatory do not endorse this tool. Their data are supplied under the terms linked above.

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