Patek Philippe introduced and patented its Annual Calendar mechanism in 1996. It distinguishes between 30- and 31-day months and, when kept running and correctly set, ordinarily requires one manual calendar correction each year at the end of February. This collection includes current unworn references and discontinued pre-owned references across the Complications, Nautilus, and Aquanaut families.
The mechanism automatically accounts for months with 30 and 31 days. February remains the exception, so the calendar normally needs one correction after the month ends; a stopped watch may also require resetting before use.
Annual Calendar references range from traditional moon-phase watches to Nautilus and Aquanaut sport-family models. Other executions add a flyback chronograph, Travel Time, or a regulator-style display. Travel Time and World Time are different complications, and not every Annual Calendar includes moon phases.
Reference suffix, dial, metal, dimensions, movement, bracelet or strap, condition, documentation, and delivery terms can all change the buying decision. Use the exact product record for price and availability, then ask the Buying Desk to locate a current or discontinued configuration when needed.
When the watch remains running and correctly set, it ordinarily needs one manual calendar correction each year at the end of February. A stopped watch may also need to be reset before use.
No. An Annual Calendar distinguishes 30- and 31-day months but normally requires a correction after February. A perpetual calendar also accounts for the leap-year cycle while it continues running.
No. Functions vary by reference. Some include moon phases, while others combine the Annual Calendar with a flyback chronograph, Travel Time, or a regulator-style display.
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