The Leap Second; Checking And Adjusting The Leap Second - Citizen H990 Eco-Drive Satellite Wave Instruction Manual

Checking and adjusting the leap second

This watch displays the time information by setting the leap second and time
difference (manual adjustment) to the International Atomic Time information
received from the satellite.
• The factory default leap second setting is "–34 seconds" (As of 1/6/2011).
• When the leap second information is received through performing manual
reception 2 (see page 30), the leap second is automatically adjusted.
• The leap second can also be adjusted manually.
You can find a list of leap seconds at the homepage of IERS (INTERNATIONAL
EARTH ROTATION & REFERENCE SYSTEMS SERVICE).
http://hpiers.obspm.fr/eop-pc/earthor/utc/TAI-UTC_tab.html
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