Full Moon and sleep
18 October 2026 at 12:00 UTC: first quarter, 48.5% illuminated, 7.84 days since new Moon.
- Phase
- First Quarter
- Illumination
- 48.46%
- Lunar age
- 7.840 days
- Phase angle
- 88.08°
- Earth–Moon distance
- 403,106 km
- Brown lunation
- 1284
Sleep diary
Entry date:2026-10-18 · UTC · 48.5% illuminated. Use the date controls above to select another entry date.
What sleep studies found
A 2013 laboratory analysis of 33 adults found about 20 minutes less sleep around full Moon and five minutes longer to fall asleep. A 2015 population study of 2,125 people found no significant lunar-phase difference in objective or subjective sleep. The studies used different populations and observation settings.
Keep a dated diary of bedtime, waking, room light and how rested you feel. Use the date control above to add the actual phase to each entry.
Study reports: Cajochen et al., 2013 and Haba-Rubio et al., 2015.