iwc DA VINCI AUTOMATIC Operating Instructions Manual page 9

Winding position 6 | 7
With the crown in the winding position (position 0), you
can also wind the automatic movement by hand. A few
revolutions of the crown are enough to start the move-
ment. However, it is better to wind the watch by turning
the crown through approximately 20 revolutions as this
will ensure maximum accuracy. The crown must always
be in position X when you are wearing your watch.
Date setting
If a month has fewer than 31 days, you must set the date
by hand to the first day of the following month. Pull the
crown to position 1. You can now set the date by rotating
the crown to the left (quick setting). You should not use
the rapid-advance function between 8 p.m. and 2 a.m.
because the movement automatically advances the date
during this period.