Electronic version of “Hong Kong Observatory Almanac 2025” now available

18 December 2024

The electronic version of Hong Kong Observatory Almanac 2025 was launched today (18 December) for free download.

The Almanac is bilingual and tabulated by month. It contains information including the traditional Chinese calendar, solar terms and moon phases, as well as the times of daily sunrise, sun transit, sunset, moonrise, moon transit, moonset, and high and low tides, with the times of meridian passage and the rising and setting of the sun and planets graphically illustrated. The Almanac also includes a detailed Sun Path Diagram and quarterly star maps of the year. In addition, information on the duration of twilight, determination of apparent solar time, details of solar and lunar eclipses and observation of meteor showers and planetary phenomena, as well as background information on calendars and the 24 solar terms are included.

The full version of the "Hong Kong Observatory Almanac 2025" in PDF format is now available on the HKO's website for browsing and download.

Front cover of Hong Kong Observatory Almanac 2025