All tools
Moon Phases & Horizon Diagram
Each phase rises and sets at a typical time. Full Moon rises at sunset; first quarter is high at sunset.
Full Moon · 18.0h — above the HK horizon
Before you start
Each phase has a typical rise and set time. That is why full moon is a night-time object.
Key idea
Full moon rises at sunset. First quarter is high at sunset. New moon shares the daytime sky with the Sun.
What you see
- Horizon diagram
- Phase and clock sliders
- Moon only when it is up
Try this
- Set full moon and 18:00 — it should be rising in the east
- Try new moon at noon
Why it matters in Hong Kong
Times are schematic local solar hours; HK does not use daylight saving, so clock time stays aligned.
Common mistakes
- Expecting the new moon at midnight
Glossary
- Rising
- Crossing the eastern horizon.