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Moon watching tips for Mid-Autumn Festival 2021

7 September 2021

The Mid-Autumn Festival this year falls on September 21 (Tuesday) and the full moon (Note) will occur in that morning. If weather permits, a bright and clear moon will be observable at night during the Mid-Autumn Festival period.

To facilitate moon watching by the public, the times of moonrise, transit, moonset and full moon during the Mid-Autumn Festival period are listed in the table below. At transit, the Moon passes the local meridian due south and its elevation is the highest of the night.

September 20 (Monday) – the eve of the Mid-Autumn Festival
Moonrise 6.13pm
Transit (Elevation 61 degrees) 0.10am (next morning)
Moonset 6.11am (next morning)
September 21 (Tuesday) – the Mid-Autumn Festival
Full Moon (The Moon is below the horizon of Hong Kong at this moment) 7.55am
Moonrise 6.47pm
Transit (Elevation 66 degrees) 0.54am (next morning)
Moonset 7.05am (next morning)
September 22 (Wednesday) – the day following the Mid-Autumn Festival
Moonrise 7.20pm
Transit (Elevation 72 degrees) 1.36am (next morning)
Moonset 7.56am (next morning)

For the latest weather conditions during the Mid-Autumn Festival period, please refer to the 9-Day Weather Forecast issued by the Hong Kong Observatory for the planning of moon-watching activities.

Note: At full moon, the Moon as seen from the Earth is completely illuminated with the Moon and the Sun located on the opposite sides of the Earth.