Do
not adjust date between 9 PM and 4 AM, during this period the day-date dial disk turn
slowly and the calendar changes. Turning the crown to change the calendar
during that time puts an extra load on the dial disk and it may damage the
parts or result in malfunction of the calendar change.
The date is
designed to change once in 24 hours. When setting the hour hand, make sure that
AM/PM is correctly set.