What is one effect of the moon phase watch system needing adjustment?

The effect of the moon phase watch system needing adjustment being that it may go out of sync every 32 months is correct because moon phase watches are designed to track the lunar cycle, which is approximately 29.5 days. Over time, even minor inaccuracies in the mechanism or the way it was originally set can lead to a discrepancy in the indicated moon phase. As a result, a watch that tracks the moon phase will require recalibration approximately every 32 months to ensure accuracy, reflecting the natural cycle of the moon and aligning the displayed phase with the actual lunar phase.

Furthermore, this timing takes into account the average length of the lunar month and the accumulated error in the watch relative to the actual moon phases. Regular adjustment is necessary to keep the moon phase display accurate, which is a fundamental aspect of properly functioning moon phase complications in watches.