Dark Sky Calendar

Find the best nights to Go Stargazing

The best time to go stargazing is when there is no bright moon at night and when the sun has set enough so that twilight does not affect observations.  Locations identified as “Dark Sky Sites” are only dark during these times, equating to about two weeks every lunar month. Nowhere has dark skies around each full moon period.

The calendar below helps you choose the best nights to stargaze. Where you see stars on a black background indicates when the skies are truly dark and where from dark locations you will be able to see the most stars and even the Milky Way spanning the sky (depending on the time of year).

Yellow sections on the calendar show when the skies are not dark due to sunlight (bold yellow) and moonlight (faded yellow). Hover over the calendar (mobile users will need to tap) to see at what time darkness falls each evening and click the calendar date for more details.

Although it doesn’t affect times significantly your location in the UK determines exactly when the sun and moon will rise and set. By default this calendar is based on being in London however each location on this website has it’s own accurate dark sky calendar.


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