Seiko CAL. 6R20 - Manual (Page 11)

English
11
It is necessary to adjust the date on the first day after a month that has less than 31
days.
Ex.) To adust the date in the a.m. period on the first day of a month following a 30-day
month.
1. The watch displays “31” instead of “1”. Pull out the crown to the first click.
2. Turn the crown to set the date to “1” and then push the crown back into the normal
position.
CAUTION
• Do not set the date between 10:00 p.m. and 1:00 a.m. If you do, the date
may not change properly / it may cause a malfunction.
● Date adjustment at the beginning of the month