[tz] Positive leap second on 2015-06-30.
Tim Parenti
tim at timtimeonline.com
Tue Jan 6 20:27:16 UTC 2015
Per IERS Bulletin C49 (2015-01-05), a positive leap second will be
observed on 2015-06-30. The attached patch updates leap-seconds.list
from NIST, retrieved from <ftp://time.nist.gov/pub/leap-seconds.3629404800>.
--
Tim Parenti
-------------- next part --------------
From d6003a7c91eb5267e60cb28e96e31be24b6eab57 Mon Sep 17 00:00:00 2001
From: Tim Parenti <tim at timtimeonline.com>
Date: Tue, 6 Jan 2015 15:22:41 -0500
Subject: Positive leap second on 2015-06-30.
* leap-seconds.list: Per IERS Bulletin C49 (2015-01-05), a positive leap
second will be inserted into the UTC time scale at the end of
2015-06-30. Update file from NIST, retrieved from
<ftp://time.nist.gov/pub/leap-seconds.3629404800>.
---
leap-seconds.list | 24 +++++++++++++++++-------
1 file changed, 17 insertions(+), 7 deletions(-)
mode change 100644 => 100755 leap-seconds.list
diff --git a/leap-seconds.list b/leap-seconds.list
old mode 100644
new mode 100755
index 0980e7b..17c0466
--- a/leap-seconds.list
+++ b/leap-seconds.list
@@ -47,7 +47,7 @@
# and can be ignored for many purposes. These differences
# are tabulated in Circular T, which is published monthly
# by the International Bureau of Weights and Measures
-# (BIPM). See www.bipm.fr for more information.
+# (BIPM). See www.bipm.org for more information.
#
# 3. The current definition of the relationship between UTC
# and TAI dates from 1 January 1972. A number of different
@@ -127,6 +127,15 @@
# with, since the difficulty of unambiguously representing the epoch
# during the leap second does not arise.
#
+# Some systems implement leap seconds by amortizing the leap second
+# over the last few minutes of the day. The frequency of the local
+# clock is decreased (or increased) to realize the positive (or
+# negative) leap second. This method removes the time step described
+# above. Although the long-term behavior of the time scale is correct
+# in this case, this method introduces an error during the adjustment
+# period both in time and in frequency with respect to the official
+# defintion of UTC.
+#
# Questions or comments to:
# Judah Levine
# Time and Frequency Division
@@ -134,7 +143,7 @@
# Boulder, Colorado
# Judah.Levine at nist.gov
#
-# Last Update of leap second values: 11 January 2012
+# Last Update of leap second values: 5 January 2015
#
# The following line shows this last update date in NTP timestamp
# format. This is the date on which the most recent change to
@@ -142,7 +151,7 @@
# be identified by the unique pair of characters in the first two
# columns as shown below.
#
-#$ 3535228800
+#$ 3629404800
#
# The NTP timestamps are in units of seconds since the NTP epoch,
# which is 1 January 1900, 00:00:00. The Modified Julian Day number
@@ -190,10 +199,10 @@
# current -- the update time stamp, the data and the name of the file
# will not change.
#
-# Updated through IERS Bulletin C48
-# File expires on: 28 June 2015
+# Updated through IERS Bulletin C49
+# File expires on: 28 December 2015
#
-#@ 3644438400
+#@ 3660249600
#
2272060800 10 # 1 Jan 1972
2287785600 11 # 1 Jul 1972
@@ -221,6 +230,7 @@
3345062400 33 # 1 Jan 2006
3439756800 34 # 1 Jan 2009
3550089600 35 # 1 Jul 2012
+3644697600 36 # 1 Jul 2015
#
# the following special comment contains the
# hash value of the data in this file computed
@@ -236,4 +246,4 @@
# the hash line is also ignored in the
# computation.
#
-#h a4862ccd c6f43c6 964f3604 85944a26 b5cfad4e
+#h 45e70fa7 a9df2033 f4a49ab0 ec648273 7b6c22c
--
2.1.1
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