Patek Philippe GENEVE 324 S QR Manual De Instrucciones página 9

PERPETUAL CALENDAR
WITH RETROGRADE DATE
HAND
The perpetual calendar indicates the day of the
week, the date, and the month, automatically taking
into account months with 28, 29, 30, and 31 days.
It switches directly from September 30 to October 1
or from February 28 to March 1. The retrograde
date hand springs back to 1 after the last day of the
month (28, 29, 30, or 31 depending on the month
and the leap-year cycle). During a leap year, the
perpetual calendar retrograde date hand displays
February 29 before jumping directly to March 1.
In addition to the date, day, and month, the watch
also features a leap-year display. The moon-phase
display is highly accurate: it deviates from the true
lunar cycle by merely one day every 122 years. If
the watch is wound daily, the perpetual calendar
will not require any manual corrections before
February 28, 2100; this is a secular year that by
exception omits February 29.
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