Complication
Annual Calendar
Knows every month length except February.
What it does
Tracks day, date and month, and automatically skips the 31st in 30-day months — so it stays correct all year without intervention. It has no leap-year mechanism, so it needs one manual correction at the end of February.
How to read it
Read day, date and month from their windows or sub-dials. Advance the date once at the start of March each year. Avoid setting it during the hours around midnight, while the calendar mechanism is engaged.
Impact on value
Positive — a real complication at a fraction of a perpetual calendar's cost, which is exactly why Patek Philippe patented it in 1996.
Keep reading
- Complication
Alarm
A mechanical buzzer on your wrist.
- Complication
Minute Repeater
Chimes the time on demand, to the minute.
- Complication
Small Seconds
A seconds hand on its own sub-dial.
- Complication
Jumping Hour
The hour snaps into a window instead of sweeping.
- Complication
Split-Seconds (Rattrapante)
Times two events at once with stacked seconds hands.
- Style
Dive Watch
Built to be legible and watertight deep underwater.