The time between two full moons is about 29 days, 12 hours, 44 minutes. This is the time it takes the Moon to make one orbit around the Earth. The dial shows how many days passed since last new moon, indicating the day in the cycle of the moon and showing on the inner circumference the phases of New Moon (Dutch: Nieuwe Maan, N.M.), First Quarter (Dutch: Eerste Kwartier, E.K.), Full Moon (Dutch: Volle Maan, V.M.) and Last Quarter (Dutch: Laatste Kwartier, L.K.).