Lines Matching full:second

15 #	LEAP SECOND
20 #	than 0.9 seconds. Therefore, when necessary a "leap second" is applied to UTC.
22 #	firstly due to the initial choice of the value of the second (1/86400 mean solar day of
24 #	theoretically possible to have a negative leap second (a second removed from UTC), but so far,
25 #	all leap seconds have been positive (a second has been added to UTC). Based on what we know about
26 #	the earth's rotation, it is unlikely that we will ever have a negative leap second.
30 #	The first leap second was added on June 30, 1972. Until the year 2000, it was necessary in average to add a
31 #       leap second at a rate of 1 to 2 years. Since the year 2000 leap seconds are introduced with an
35 #	RESPONSIBILITY OF THE DECISION TO INTRODUCE A LEAP SECOND IN UTC
36 #	The decision to introduce a leap second in UTC is the responsibility of the Earth Orientation Center of
39 #	first preference is given to the end of December and June, and second preference at the end of March