leapseconds 2.2 KB

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  1. # Allowance for leap seconds added to each time zone file.
  2. # This file is in the public domain.
  3. # This file is generated automatically from the data in the public-domain
  4. # leap-seconds.list file available from most NIST time servers.
  5. # If the URL <ftp://time.nist.gov/pub/leap-seconds.list> does not work,
  6. # you should be able to pick up leap-seconds.list from a secondary NIST server.
  7. # For more about leap-seconds.list, please see
  8. # The NTP Timescale and Leap Seconds
  9. # http://www.eecis.udel.edu/~mills/leap.html
  10. # The International Earth Rotation and Reference Systems Service
  11. # periodically uses leap seconds to keep UTC to within 0.9 s of UT1
  12. # (which measures the true angular orientation of the earth in space); see
  13. # Terry J Quinn, The BIPM and the accurate measure of time,
  14. # Proc IEEE 79, 7 (July 1991), 894-905 <http://dx.doi.org/10.1109/5.84965>.
  15. # There were no leap seconds before 1972, because the official mechanism
  16. # accounting for the discrepancy between atomic time and the earth's rotation
  17. # did not exist until the early 1970s.
  18. # The correction (+ or -) is made at the given time, so lines
  19. # will typically look like:
  20. # Leap YEAR MON DAY 23:59:60 + R/S
  21. # or
  22. # Leap YEAR MON DAY 23:59:59 - R/S
  23. # If the leapsecond is Rolling (R) the given time is local time.
  24. # If the leapsecond is Stationary (S) the given time is UTC.
  25. # Leap YEAR MONTH DAY HH:MM:SS CORR R/S
  26. Leap 1972 Jun 30 23:59:60 + S
  27. Leap 1972 Dec 31 23:59:60 + S
  28. Leap 1973 Dec 31 23:59:60 + S
  29. Leap 1974 Dec 31 23:59:60 + S
  30. Leap 1975 Dec 31 23:59:60 + S
  31. Leap 1976 Dec 31 23:59:60 + S
  32. Leap 1977 Dec 31 23:59:60 + S
  33. Leap 1978 Dec 31 23:59:60 + S
  34. Leap 1979 Dec 31 23:59:60 + S
  35. Leap 1981 Jun 30 23:59:60 + S
  36. Leap 1982 Jun 30 23:59:60 + S
  37. Leap 1983 Jun 30 23:59:60 + S
  38. Leap 1985 Jun 30 23:59:60 + S
  39. Leap 1987 Dec 31 23:59:60 + S
  40. Leap 1989 Dec 31 23:59:60 + S
  41. Leap 1990 Dec 31 23:59:60 + S
  42. Leap 1992 Jun 30 23:59:60 + S
  43. Leap 1993 Jun 30 23:59:60 + S
  44. Leap 1994 Jun 30 23:59:60 + S
  45. Leap 1995 Dec 31 23:59:60 + S
  46. Leap 1997 Jun 30 23:59:60 + S
  47. Leap 1998 Dec 31 23:59:60 + S
  48. Leap 2005 Dec 31 23:59:60 + S
  49. Leap 2008 Dec 31 23:59:60 + S
  50. Leap 2012 Jun 30 23:59:60 + S
  51. Leap 2015 Jun 30 23:59:60 + S
  52. # Updated through IERS Bulletin C50
  53. # File expires on: 28 June 2016