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The stainless steel and blue W406.4 WorldWatch II AM/PM Dial from Yes Watch calculates sun, moon, and time data once every twenty-four hours, at midnight home time, which is based on complex astronomical algorithms using UTC time reference and whole degrees of latitude and longitude. Since every degree of longitude represents four minutes, the sun and the moon calculations carry an accuracy of plus/minus two minutes. Since the moon waxes or wanes approximately 4% every day, one percent of illumination is about six hours. Equinoxes, solstices, and cross-quarter dates are subject to some cultural interpretations, so in the calculations Yes Watch chose a mathematical mid-point between equinox and solstice. Each sun and moon segment in the LCD display represents 15 minutes, and each sliver in the moon phase display represent about 44 hours.
The 24 hour bezel can be set to easily keep track of a second time zone at a glance.
Summary of Time Data Offered
Hours, minutes, and seconds in AM/PM or 2400 format
24 hour analog hand
Noon on top, midnight on bottom
Month, date, and day
Year, day of year, and week number
Times for sunrise, sunset, and solar high noon
Sunrise and sunset alarms half hour before and at the event
Equinox, solstice, and cross-quarter alerts
Moonrise, moonset, and moon phase
Percentage lunar illumination
Time and date for next new and full moons
Past/future date calculator for sun, moon, and time data
Time data capability for the years 2000-2099
Regular set alarm with 10 minute snooze
24 hour stopwatch with lap time
99 minute timer with alarm
9999-day countdown/countup for set event time/date with alarm
Programmed for 583 cities worldwide
Keeps digital time for two location, home and away
Symbol bezel can be used to keep time for a third time zone
Location can also be set by latitude and longitude, time zone and one of five major DST systems
Automatically adjusts for Daylight Saving Time (DST) worldwide
DST can be set or adjusted manually
Backlight for nighttime viewing
Digital time can be turned off
Bracelet has been fitted snugly to the case
Locking butterfly clasp
The sapphire crystal is virtually scratch-proof and the improved near white contrast in the screen makes readability a virtual non-issue. Stainless steel construction to 10 ATM specifications
In the Box
Yes Watch W406.4 WorldWatch II AM/PM Dial (Stainless Steel, Blue)