First Quarter Moon
Friday, 21 December 1917 · 06:07 local in London
1917-12-21 06:07 UTC · Europe/London
First Quarter Moon occurs at 06:07 local time in London on 21 December. Half of the visible disc is lit, and the terminator cuts across the middle. Long shadows make craters along the dividing line stand out.
Moon altitude
-34°
At the exact phase
Illumination
50%
First Quarter
Local date
21 Dec
1917
Viewing tips
- Look along the terminator for the strongest crater shadows.
- The Moon is highest in the evening during this phase.
- Binoculars are enough to see major craters and maria.
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
First Quarter · 50% lit
Phase at 06:07 local · NASA LRO surface
Next moonrise
11:34
Next moonset
01:12
Next events
Calendar →Dec 1917
28
Full Moon
Below horizon09:51 local · Fri, Fri 28 Dec · Moon -11°
Jan 1918
5
Last Quarter Moon
Below horizon11:49 local · Sat, Sat 5 Jan · Moon -9°
Jan 1918
12
New Moon
Not visible22:35 local · Sat, Sat 12 Jan · Moon -54°
Jan 1918
19
First Quarter Moon
Above horizon14:38 local · Sat, Sat 19 Jan · Moon 37°