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2018-12-18

2018-12-18 10:39:08 by Henrik Grubbström (Grubba) <grubba@grubba.org>

Updated to tzdata2018g.

8:    print "# This file is in the public domain."    print ""    print "# This file is generated automatically from the data in the public-domain" -  print "# leap-seconds.list file, which is copied from:" -  print "# ftp://ftp.nist.gov/pub/time/leap-seconds.list" +  print "# leap-seconds.list file, which can be copied from" +  print "# <ftp://ftp.nist.gov/pub/time/leap-seconds.list>" +  print "# or <ftp://ftp.boulder.nist.gov/pub/time/leap-seconds.list>" +  print "# or <ftp://tycho.usno.navy.mil/pub/ntp/leap-seconds.list>."    print "# For more about leap-seconds.list, please see"    print "# The NTP Timescale and Leap Seconds" -  print "# https://www.eecis.udel.edu/~mills/leap.html" +  print "# <https://www.eecis.udel.edu/~mills/leap.html>."    print ""    print "# The International Earth Rotation and Reference Systems Service"    print "# periodically uses leap seconds to keep UTC to within 0.9 s of UT1" -  print "# (which measures the true angular orientation of the earth in space); see" -  print "# Levine J. Coordinated Universal Time and the leap second." +  print "# (which measures the true angular orientation of the earth in space)" +  print "# and publishes leap second data in a copyrighted file" +  print "# <https://hpiers.obspm.fr/iers/bul/bulc/Leap_Second.dat>." +  print "# See: Levine J. Coordinated Universal Time and the leap second."    print "# URSI Radio Sci Bull. 2016;89(4):30-6. doi:10.23919/URSIRSB.2016.7909995" -  print "# http://ieeexplore.ieee.org/document/7909995/" +  print "# <https://ieeexplore.ieee.org/document/7909995>."    print "# There were no leap seconds before 1972, because the official mechanism"    print "# accounting for the discrepancy between atomic time and the earth's rotation" -  print "# did not exist until the early 1970s." +  print "# did not exist."    print ""    print "# The correction (+ or -) is made at the given time, so lines"    print "# will typically look like:"
30:    print "# or"    print "# Leap YEAR MON DAY 23:59:59 - R/S"    print "" -  print "# If the leapsecond is Rolling (R) the given time is local time." -  print "# If the leapsecond is Stationary (S) the given time is UTC." -  print "" -  print "# Leap YEAR MONTH DAY HH:MM:SS CORR R/S" +  print "# If the leap second is Rolling (R) the given time is local time (unused here)." +  +  monthabbr[ 1] = "Jan" +  monthabbr[ 2] = "Feb" +  monthabbr[ 3] = "Mar" +  monthabbr[ 4] = "Apr" +  monthabbr[ 5] = "May" +  monthabbr[ 6] = "Jun" +  monthabbr[ 7] = "Jul" +  monthabbr[ 8] = "Aug" +  monthabbr[ 9] = "Sep" +  monthabbr[10] = "Oct" +  monthabbr[11] = "Nov" +  monthabbr[12] = "Dec" +  for (i in monthabbr) { +  monthnum[monthabbr[i]] = i +  monthlen[i] = 31    } -  +  monthlen[2] = 28 +  monthlen[4] = monthlen[6] = monthlen[9] = monthlen[11] = 30 + }    - /^ *$/ { next } -  +    /^#\tUpdated through/ || /^#\tFile expires on:/ {    last_lines = last_lines $0 "\n"   }    -  + /^#[$][ \t]/ { updated = $2 } + /^#[@][ \t]/ { expires = $2 } +    /^#/ { next }      {
57:    } else {    sign = "23:59:59\t-"    } -  if (month == "Jan") { +  m = monthnum[month] - 1 +  if (m == 0) {    year--; -  month = "Dec"; -  day = 31 -  } else if (month == "Jul") { -  month = "Jun"; -  day = 30 +  m = 12    } -  +  month = monthabbr[m] +  day = monthlen[m] +  day += m == 2 && year % 4 == 0 && (year % 100 != 0 || year % 400 == 0)    printf "Leap\t%s\t%s\t%s\t%s\tS\n", year, month, day, sign    }    old_TAI_minus_UTC = TAI_minus_UTC   }      END { -  +  # The difference between the NTP and POSIX epochs is 70 years +  # (including 17 leap days), each 24 hours of 60 minutes of 60 +  # seconds each. +  epoch_minus_NTP = ((1970 - 1900) * 365 + 17) * 24 * 60 * 60 +  +  print "" +  print "# POSIX timestamps for the data in this file:" +  printf "#updated %s\n", updated - epoch_minus_NTP +  printf "#expires %s\n", expires - epoch_minus_NTP    printf "\n%s", last_lines   }