This watch sets itself to WWV as this tech from FixYa has previously explained:
http://www.fixya.com/support/t430634-set_lacrosse_wt_961_b_watch
This is a neat watch. Here's a review explanation of it from Amazon.com:
Amazon.com Review
With an advanced time-telling mechanism that manages itself, this La Crosse Technology metal watch keeps time with absolute accuracy. Equipped with an internal antenna, the watch reads a radio signal transmitted from WWVB in Fort Collins, Colorado. The station, in turn, receives its signal from the National Institute of Science and Technology's atomic clock, which is accurate to the 10 billionth of a second. Transmission is continual and automatic, so the watch readjusts itself, even allowing for shifts due to Daylight Savings. It also displays the day of the week, the date, and the month. Customizable settings allow you to set your time zone and choose between a 12- or 24-hour display. Water-resistant, the watch comes with a metallic blue butterfly clasp and stainless-steel band that can be adjusted to fit most wrists. The battery should last three years or more--a low-battery indicator signals when to change it. Please note: The watch receives the WWVB signal in time zones GMT-4 (Maine) through GMT -10 (Hawaii) only.
--Emily Bedard
Product Description
This watch is set by the US Government Atomic Clock, meaning it will continually have the most accurate time. This watch also will change time automatically during Daylight Saving Time.
Excuse the stuck font, but this is a neat piece of technology!
Enjoy!