Orient ES(46C) Manual Del Usuario página 24

◆ HOW TO SET THE MONTHLY CALENDAR
Some models come with a calendar function which uses an inner ring or bezel
on the exterior of the case to indicate the date.
The monthly calendar can be used by turning the crown to set the rotating ring
inside the watchcase and aligning it with the day of the week that is printed
on the dial.
Turn the crown to align the first day of the month to the appropriate day of
the week.
* Note that when setting the first day of the month, if the days at the end of the
month (31st, etc.) are aligned with the section that does not have the days
of the week printed on the dial (3 - 4 o'clock side), days of the week will not
be indicated at the end of the month.
* The position of the inner ring crown and details of the date indicator may
vary depending on the model.
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