Monochrome Watches
An online magazine dedicated to fine watches

Moon phase

The moon phase is an indicator that keeps track of the phases of the moon. A regular rotation of the moon is once around the earth every 29 days, 12 hours, 44 minutes and 2.9 seconds. Once set, the moon phase indicator accurately displays the phase of the moon. Most moon phase indications are precise set to a rotation of 29.5 days, while some are more precise.