(available on some models) With your fingertips, apply slight pressure to the front of the moon dial and rotate the moon dial clockwise until the moon is directly below the #15 lunar day mark (each mark represents a lunar day) on the lunar arch (See figure 5).
If the moon dial will not rotate: Sometimes when you attempt to move the moon dial it will appear stuck. Usually when this occurs it means the clock is in the process of advancing the dial itself.
In this case it is important not to force it. You will either need to move the minutes hands several 24 hours or wait several hours and you should be able to easily move the moon phase dial.
1. Refer to an almanac or calendar and determine the date of the last full moon.Count the number of days past the last full moon.
2. Rotate the moon dial clockwise 1 lunar day for every day past the full moon.
Example: If the last full moon was 3 days ago, rotate the moon dial clockwise 3 lunar days so that the moon is centered at lunar day 18 on the lunar arch.
The moon dial is now set and will indicate the proper moon phases as long as the clock operates continuously.
If the clock stops the moon dial will also stop and must be reset when the clock is started again.
Moon phases 2013
The data are calculated from the timezone MST (Mountain Standard Time) (UTC-07). When you are living in the western part of the USA (UTC-08) it’s one hour earlier and if you are living in the Eastern part of the USA (UTC-05) it’s two hours later.
Moon phase Date Time
Full moon January 26, 2013 09:40:28 PM
Full moon February 25, 2013 01:28:51 PM
Full moon March 27, 2013 02:30:20 AM
Full moon April 25, 2013 12:59:57 PM
Full moon May 24, 2013 09:27:03 PM
Full moon June 23, 2013 04:33:38 AM
Full moon July 22, 2013 11:16:32 AM
Full moon August 20, 2013 06:45:06 PM
Full moon September 19, 2013 04:12:38 AM
Full moon October 18, 2013 04:37:36 PM
Full moon November 17, 2013 08:16:30 AM
Full moon December 17, 2013 02:29:20 AM
Antique clock repair: Setting a moon dial on an antique clock.