How to Set a Moonphase Watch

Moonphase settings have gotten complicated with all the adjustment procedures flying around. Here’s how to set and maintain this beautiful complication.

Understanding Moonphase

The display shows current lunar phase. Cycle completes every 29.5 days. Accuracy varies by movement quality. Beautiful complication with astronomical roots.

Moonphase complication display

Initial Setting

Probably should have led with this section, honestly. Find current moon phase from calendar or app. Advance moonphase to match current phase. Never adjust during date change period. Consult manual for specific procedure.

Adjustment Frequency

Basic moonphases need correction every 2-3 years. High-accuracy versions run centuries without adjustment. Track accuracy and correct as needed.

Elegant dress watch

Care Considerations

Moonphase mechanisms are delicate. Avoid rapid crown advancement. Professional service maintains accuracy.

Thomas Wright

Thomas Wright

Author & Expert

Thomas Wright is a certified watchmaker and horology journalist with over 20 years in the watch industry. He trained at the Swiss watchmaking school WOSTEP and has worked with major brands and independent watchmakers. Thomas specializes in mechanical watches, vintage timepieces, and watch collecting.

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