General
- Q1
- About "Leap second" adjustment
- A1
-
On June 30 2015 Coordinated Universal Time (UTC), clocks will move forward by 1 second with the inclusion of a "leap second".
The leap second will be added on June 30 2015 immediately after 11.59.59 pm UTC.
At 11.59.59, clocks will advance to 11.59.60 (leap second) and then to 00.00.00.
The leap second advance will be carried out simultaneously all over the world.
The inclusion of the leap second means that the length of July 1 will increase by 1 second to 24 hours and 1 second.
The "Leap second" adjustment
As of 11.59.59 pm Coordinated Universal Time (UTC) on June 30 2015, clocks will move forward by 1 second. However, watches can be adjusted to the correct time by receiving the leap second from GPS satellites.
Receiving GPS signals
(1) Press and hold the lower right button on the watch (▲) for at least 1 second.
(2) Release the button when the second hand indicates "T" (Time).
(3) When signal reception is complete, press the lower right button on the watch (▲). GPS signal reception is complete when "Y" (Yes) is indicated. If "N" (No) is indicated, repeat the procedure from step (1).
Leap second signal reception could take up to a maximum of roughly 13 minutes.
Carry out GPS signal reception in a location that is open to the sky.* What is a leap second?A leap second is a one-second adjustment made for the difference between the standard time kept by extremely accurate cesium atomic clocks and Universal Time, which is determined based on the movements of the Earth (rotational and orbital).