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Lunar phaseBelow horizon at event timeDefault location · London

Full Moon

Sunday, 4 January 1931 · 13:15 local in London

1931-01-04 13:15 UTC · Europe/London

Full Moon occurs at 13:15 local time in London on 4 January. The Moon is opposite the Sun and fully illuminated. It is easy to see all night, but surface contrast is lowest because sunlight is nearly head-on.

Moon altitude

-10°

At the exact phase

Illumination

100%

Full Moon

Local date

4 Jan

1931

Viewing tips

  • No dark adaptation is needed — the Moon is bright.
  • Use a moon filter if the glare is uncomfortable through a telescope.
  • Look for bright ray systems such as Tycho and Copernicus.

Visibility, honestly

Below the horizon at the exact moment — look near moonrise or moonset.

A phase is a global instant; whether it is above your horizon depends on location. Weather is not included here. Check the tonight outlook for cloud cover and a viewing score. No eclipse or conjunction claim is made on this page.

Phase times from Astronomy Engine. Rise/set and altitude use atmospheric refraction. Method