Citizen 520 Instruction Manual page 8

1. Pull the crown out to the date correction position.
2. Turn the crown to the right to set the date.
* The crown turns freely and the date does not change if the crown is turned to
the left.
* If the date is set while the time on the watch is between the hours of about
9:00 PM and 1:00 AM, the date may not change on the following day. If
this happens, set the date after temporarily moving the hands to a time other
than between the above times.
* The date is based on a 31-day calendar. The date must be changed from
the last day of the month to the first day of the following month for those
months not having 31 days (months having 30 days and February).
3. Once the date has finished being set, return the crown to the normal position.
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