Home | History | Annotate | Line # | Download | only in dist
leapseconds revision 1.1.1.9 
      1 # Allowance for leap seconds added to each time zone file.
      2 
      3 # This file is in the public domain.
      4 
      5 # This file is generated automatically from the data in the public-domain
      6 # leap-seconds.list file, which is copied from:
      7 # ftp://ftp.nist.gov/pub/time/leap-seconds.list
      8 # For more about leap-seconds.list, please see
      9 # The NTP Timescale and Leap Seconds
     10 # https://www.eecis.udel.edu/~mills/leap.html
     11 
     12 # The International Earth Rotation and Reference Systems Service
     13 # periodically uses leap seconds to keep UTC to within 0.9 s of UT1
     14 # (which measures the true angular orientation of the earth in space); see
     15 # Levine J. Coordinated Universal Time and the leap second.
     16 # URSI Radio Sci Bull. 2016;89(4):30-6. doi:10.23919/URSIRSB.2016.7909995
     17 # http://ieeexplore.ieee.org/document/7909995/
     18 # There were no leap seconds before 1972, because the official mechanism
     19 # accounting for the discrepancy between atomic time and the earth's rotation
     20 # did not exist until the early 1970s.
     21 
     22 # The correction (+ or -) is made at the given time, so lines
     23 # will typically look like:
     24 #	Leap	YEAR	MON	DAY	23:59:60	+	R/S
     25 # or
     26 #	Leap	YEAR	MON	DAY	23:59:59	-	R/S
     27 
     28 # If the leapsecond is Rolling (R) the given time is local time.
     29 # If the leapsecond is Stationary (S) the given time is UTC.
     30 
     31 # Leap	YEAR	MONTH	DAY	HH:MM:SS	CORR	R/S
     32 Leap	1972	Jun	30	23:59:60	+	S
     33 Leap	1972	Dec	31	23:59:60	+	S
     34 Leap	1973	Dec	31	23:59:60	+	S
     35 Leap	1974	Dec	31	23:59:60	+	S
     36 Leap	1975	Dec	31	23:59:60	+	S
     37 Leap	1976	Dec	31	23:59:60	+	S
     38 Leap	1977	Dec	31	23:59:60	+	S
     39 Leap	1978	Dec	31	23:59:60	+	S
     40 Leap	1979	Dec	31	23:59:60	+	S
     41 Leap	1981	Jun	30	23:59:60	+	S
     42 Leap	1982	Jun	30	23:59:60	+	S
     43 Leap	1983	Jun	30	23:59:60	+	S
     44 Leap	1985	Jun	30	23:59:60	+	S
     45 Leap	1987	Dec	31	23:59:60	+	S
     46 Leap	1989	Dec	31	23:59:60	+	S
     47 Leap	1990	Dec	31	23:59:60	+	S
     48 Leap	1992	Jun	30	23:59:60	+	S
     49 Leap	1993	Jun	30	23:59:60	+	S
     50 Leap	1994	Jun	30	23:59:60	+	S
     51 Leap	1995	Dec	31	23:59:60	+	S
     52 Leap	1997	Jun	30	23:59:60	+	S
     53 Leap	1998	Dec	31	23:59:60	+	S
     54 Leap	2005	Dec	31	23:59:60	+	S
     55 Leap	2008	Dec	31	23:59:60	+	S
     56 Leap	2012	Jun	30	23:59:60	+	S
     57 Leap	2015	Jun	30	23:59:60	+	S
     58 Leap	2016	Dec	31	23:59:60	+	S
     59 
     60 #	Updated through IERS Bulletin C54
     61 #	File expires on:  28 June 2018
     62