MFC of 279706,tzdata10:

Release 2015a - 2015-01-29

Changes affecting future time stamps

    The Mexican state of Quintana Roo, represented by America/Cancun,
    will shift from Central Time with DST to Eastern Time without DST
    on 2015-02-01 at 02:00.  (Thanks to Steffen Thorsen and Gwillim Law.)

    Chile will not change clocks in April or thereafter; its new standard time
    will be its old daylight saving time.  This affects America/Santiago,
    Pacific/Easter, and Antarctica/Palmer.  (Thanks to Juan Correa.)

    New leap second 2015-06-30 23:59:60 UTC as per IERS Bulletin C 49.
    (Thanks to Tim Parenti.)

  Changes affecting past time stamps

    Iceland observed DST in 1919 and 1921, and its 1939 fallback
    transition was Oct. 29, not Nov. 29.  Remove incorrect data from
    Shanks about time in Iceland between 1837 and 1908.

    Some more zones have been turned into links, when they differed
    from existing zones only for older time stamps.  As usual,
    these changes affect UTC offsets in pre-1970 time stamps only.
    Their old contents have been moved to the 'backzone' file.
    The affected zones are: Asia/Aden, Asia/Bahrain, Asia/Kuwait,
    and Asia/Muscat.

1 files changed, 17 insertions, 7 deletions

diff --git a/contrib/tzdata/leap-seconds.list b/contrib/tzdata/leap-seconds.list
index 0980e7b..17c0466 100644
--- a/contrib/tzdata/leap-seconds.list
+++ b/contrib/tzdata/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@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