How do I adjust a Patek Philippe with moon-phase functionality?

How you adjust a Patek Philippe watch with moon-phase functionality is going to depend on the model. Each PP watch with a complication that allows for moon-phase tracking comes with instructions to guide you through the process. A calculator tool on the Patek Philippe website, featured in the “Settings” section, can be of help. The tool shows you how to position the dial to begin accurately tracking the phases of the moon according to today’s date. To use it, simply enter the current month, day and year and press the "calculate" button. Shop a range of Patek Philippe watches with moon-phase functionality on 1stDibs.