Update leap-seconds to latest. This will satisfy the ntpd leap-second

version check.

Obtained from:	ftp://tycho.usno.navy.mil/pub/ntp/.
See also:	http://www.iers.org/SharedDocs/News/EN/BulletinC.html

1 files changed, 218 insertions, 116 deletions

diff --git a/etc/ntp/leap-seconds b/etc/ntp/leap-seconds
index b8b41f2..8fa6225 100644
--- a/etc/ntp/leap-seconds
+++ b/etc/ntp/leap-seconds
@@ -1,119 +1,221 @@
 #
 # $FreeBSD$
 #
-#	ATOMIC TIME.
-#	The Coordinated Universal Time (UTC) is the reference time scale derived 
-#	from The "Temps Atomique International" (TAI) calculated by the Bureau 
-#	International des Poids et Mesures (BIPM) using a worldwide network of atomic 
-#	clocks. UTC differs from TAI by an integer number of seconds; it is the basis 
-#	of all activities in the world. 
-#
-#
-#	ASTRONOMICAL TIME (UT1) is the time scale based on the rate of rotation of the earth. 
-#	It is now mainly derived from Very Long Baseline Interferometry (VLBI). The various 
-#	irregular fluctuations progressively detected in the rotation rate of the Earth lead 
-#	in 1972 to the replacement of UT1 by UTC as the reference time scale. 
-#
-#
-#	LEAP SECOND
-#	Atomic clocks are more stable than the rate of the earth rotatiob since the later 
-#	undergoes a full range of geophysical perturbations at various time scales (lunisolar 
-#	and core-mantle torques,atmospheric and oceanic effetcs, ...)
-#	Leap seconds are needed to keep the two time scales in agreement, i.e. UT1-UTC smaller 
-#	than 0.9 second. So, when necessary a "leap second" is introduced in UTC.
-#	Since the adoption of this system in 1972 it has been necessary to add 26 seconds to UTC, 
-#	firstly due to the initial choice of the value of the second (1/86400 mean solar day of 
-#	the year 1820) and secondly to the general slowing down of the Earth's rotation. It is 
-#	theorically possible to have a negative leap second (a second removed from UTC), but so far, 
-#	all leap seconds have been positive (a second has been added to UTC). Based on what we know about the earth's rotation, 
-#	it is unlikely that we will ever have a negative leap second.
-#
-#
-#	HISTORY
-#	The first leap second was added on June 30, 1972. Until 2000, it was necessary in average to add a leap second at a rate 
-#	of 1 to 2 years. Since 2000, due to the fact that the earth rate of rotation is accelerating, leap seconds are introduced 
-#	with an average  frequency of 3 to 4 years.
-#
-#
-#	RESPONSABILITY OF THE DECISION TO INTRODUCE A LEAP SECOND IN UTC
-#	The decision to introduce a leap second in UTC is the responsibility of the Earth Orientation Center of 
-#	the International Earth Rotation and reference System Service (IERS). This center is located at Paris 
-#	Observatory. According to international agreements, leap second date have to occur at fixed date :
-#	first preference is given to the end of December and June, and second preference at the end of March 
-#	and September. Since the system was introduced in 1972, only dates in June and December were used.
-#
-#		Questions or comments to:
-#			Daniel Gambis, daniel.gambis@obspm.fr
-#			Christian Bizouard:  christian.bizouard@obspm.fr
-#			Earth orientation Center of the IERS
-#			Paris Observatory, France	
-#			
-#
-#
-#	VALIDITY OF THE FILE
-#	It is important to express the validity of the file. These next two dates are
-#	given in units of seconds since 1900.0.
-#
-#	1) Last update of the file. 
-#
-#	Updated through IERS Bulletin C (ftp://hpiers.obspm.fr/iers/bul/bulc/bulletinc.dat)
-#
-#	The following line shows the last update of this file in NTP timestamp: 
-#
-#$	3645216000 
-#	 
-#	2) Expiration date of the file given on a semi-annual basis: last June or last December
-#
-#	File expires on 28 December 2015
-#
-#	Expire date in NTP timestamp: 
-#
-#@	3660249600
-#
-#
-#	LIST OF LEAP SECONDS
-#	NTP timestamp (X parameter) is the number of seconds since 1900.0
-#
-#	MJD: The Modified Julian Day number. MJD = X/86400 + 15020
-#
-#	DTAI: The difference DTAI= TAI-UTC in units of seconds
-#	It is the quantity to add to UTC to get the time in TAI
-#
-#	Day Month Year : epoch in clear
-#
-#NTP Time      DTAI    Day Month Year
-#
-2272060800      10      # 1 Jan 1972
-2287785600      11      # 1 Jul 1972
-2303683200      12      # 1 Jan 1973
-2335219200      13      # 1 Jan 1974
-2366755200      14      # 1 Jan 1975
-2398291200      15      # 1 Jan 1976
-2429913600      16      # 1 Jan 1977
-2461449600      17      # 1 Jan 1978
-2492985600      18      # 1 Jan 1979
-2524521600      19      # 1 Jan 1980
-2571782400      20      # 1 Jul 1981
-2603318400      21      # 1 Jul 1982
-2634854400      22      # 1 Jul 1983
-2698012800      23      # 1 Jul 1985
-2776982400      24      # 1 Jan 1988
-2840140800      25      # 1 Jan 1990
-2871676800      26      # 1 Jan 1991
-2918937600      27      # 1 Jul 1992
-2950473600      28      # 1 Jul 1993
-2982009600      29      # 1 Jul 1994
-3029443200      30      # 1 Jan 1996
-3076704000      31      # 1 Jul 1997
-3124137600      32      # 1 Jan 1999
-3345062400      33      # 1 Jan 2006
-3439756800      34      # 1 Jan 2009
-3550089600      35      # 1 Jul 2012
-3644697600      36      # 1 Jul 2015
-#
-#	In order to verify the integrity of this file, a hash code 
-#	has been generated. For more information how to use
-#	this hash code, please consult the README file under the 
-#	'sha' repertory.
-#
-#h	620ba8af 37900668 95ac09ba d77640f9 6fd75493
+#	In the following text, the symbol '#' introduces
+#	a comment, which continues from that symbol until 
+#	the end of the line. A plain comment line has a
+#	whitespace character following the comment indicator.
+#	There are also special comment lines defined below. 
+#	A special comment will always have a non-whitespace 
+#	character in column 2.
+#
+#	A blank line should be ignored.
+#
+#	The following table shows the corrections that must
+#	be applied to compute International Atomic Time (TAI)
+#	from the Coordinated Universal Time (UTC) values that
+#	are transmitted by almost all time services.
+#
+#	The first column shows an epoch as a number of seconds
+#	since 1900.0 and the second column shows the number of
+#	seconds that must be added to UTC to compute TAI for
+#	any timestamp at or after that epoch. The value on 
+#	each line is valid from the indicated initial instant
+#	until the epoch given on the next one or indefinitely 
+#	into the future if there is no next line.
+#	(The comment on each line shows the representation of
+#	the corresponding initial epoch in the usual 
+#	day-month-year format. The epoch always begins at
+#	00:00:00 UTC on the indicated day. See Note 5 below.)
+#	
+#	Important notes:
+#
+#	1. Coordinated Universal Time (UTC) is often referred to
+#	as Greenwich Mean Time (GMT). The GMT time scale is no
+#	longer used, and the use of GMT to designate UTC is
+#	discouraged.
+#
+#	2. The UTC time scale is realized by many national 
+#	laboratories and timing centers. Each laboratory
+#	identifies its realization with its name: Thus
+#	UTC(NIST), UTC(USNO), etc. The differences among
+#	these different realizations are typically on the
+#	order of a few nanoseconds (i.e., 0.000 000 00x s)
+#	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.
+#
+#	3. The current defintion of the relationship between UTC 
+#	and TAI dates from 1 January 1972. A number of different 
+#	time scales were in use before than epoch, and it can be 
+#	quite difficult to compute precise timestamps and time 
+#	intervals in those "prehistoric" days. For more information,
+#	consult:
+#
+#		The Explanatory Supplement to the Astronomical
+#		Ephemeris.
+#	or
+#		Terry Quinn, "The BIPM and the Accurate Measurement
+#		of Time," Proc. of the IEEE, Vol. 79, pp. 894-905,
+#		July, 1991.
+#
+#	4.  The insertion of leap seconds into UTC is currently the
+#	responsibility of the International Earth Rotation Service,
+#	which is located at the Paris Observatory: 
+#
+#	Central Bureau of IERS
+#	61, Avenue de l'Observatoire
+#	75014 Paris, France.
+#
+#	Leap seconds are announced by the IERS in its Bulletin C
+#
+#	See hpiers.obspm.fr or www.iers.org for more details.
+#
+#	All national laboratories and timing centers use the
+#	data from the BIPM and the IERS to construct their
+#	local realizations of UTC.
+#
+#	Although the definition also includes the possibility
+#	of dropping seconds ("negative" leap seconds), this has 
+#	never been done and is unlikely to be necessary in the 
+#	foreseeable future.
+#
+#	5. If your system keeps time as the number of seconds since
+#	some epoch (e.g., NTP timestamps), then the algorithm for
+#	assigning a UTC time stamp to an event that happens during a positive
+#	leap second is not well defined. The official name of that leap 
+#	second is 23:59:60, but there is no way of representing that time 
+#	in these systems. 
+#	Many systems of this type effectively stop the system clock for 
+#	one second during the leap second and use a time that is equivalent 
+#	to 23:59:59 UTC twice. For these systems, the corresponding TAI 
+#	timestamp would be obtained by advancing to the next entry in the
+#	following table when the time equivalent to 23:59:59 UTC
+#	is used for the second time. Thus the leap second which
+#	occurred on 30 June 1972 at 23:59:59 UTC would have TAI
+#	timestamps computed as follows:
+#
+#	...
+#	30 June 1972 23:59:59 (2287785599, first time):	TAI= UTC + 10 seconds
+#	30 June 1972 23:59:60 (2287785599,second time):	TAI= UTC + 11 seconds
+#	1  July 1972 00:00:00 (2287785600)		TAI= UTC + 11 seconds
+#	...
+#
+#	If your system realizes the leap second by repeating 00:00:00 UTC twice
+#	(this is possible but not usual), then the advance to the next entry
+#	in the table must occur the second time that a time equivlent to 
+#	00:00:00 UTC is used. Thus, using the same example as above:
+#
+#	...
+#       30 June 1972 23:59:59 (2287785599):		TAI= UTC + 10 seconds
+#       30 June 1972 23:59:60 (2287785600, first time):	TAI= UTC + 10 seconds
+#       1  July 1972 00:00:00 (2287785600,second time):	TAI= UTC + 11 seconds
+#	...
+#
+#	in both cases the use of timestamps based on TAI produces a smooth
+#	time scale with no discontinuity in the time interval.
+#
+#	This complexity would not be needed for negative leap seconds (if they 
+#	are ever used). The UTC time would skip 23:59:59 and advance from 
+#	23:59:58 to 00:00:00 in that case.  The TAI offset would decrease by 
+#	1 second at the same instant.  This is a much easier situation to deal 
+#	with, since the difficulty of unambiguously representing the epoch 
+#	during the leap second does not arise.
+#
+#	Questions or comments to:
+#		Jeff Prillaman
+#		Time Service Department
+#		US Naval Observatory
+#		Washington, DC
+#		jeffrey.prillaman@usno.navy.mil
+#
+#	Last Update of leap second values:  31 Dec 2015
+#
+#	The following line shows this last update date in NTP timestamp 
+#	format. This is the date on which the most recent change to
+#	the leap second data was added to the file. This line can
+#	be identified by the unique pair of characters in the first two 
+#	columns as shown below.
+#
+#$	 3660508800
+#
+#	The data in this file will be updated periodically as new leap 
+#	seconds are announced. In addition to being entered on the line
+#	above, the update time (in NTP format) will be added to the basic 
+#	file name leap-seconds to form the name leap-seconds.<NTP TIME>.
+#	In addition, the generic name leap-seconds.list will always point to 
+#	the most recent version of the file.
+#
+#	This update procedure will be performed only when a new leap second
+#	is announced. 
+#
+#	The following entry specifies the expiration date of the data
+#	in this file in units of seconds since 1900.0.  This expiration date 
+#	will be changed at least twice per year whether or not a new leap 
+#	second is announced. These semi-annual changes will be made no
+#	later than 1 June and 1 December of each year to indicate what
+#	action (if any) is to be taken on 30 June and 31 December, 
+#	respectively. (These are the customary effective dates for new
+#	leap seconds.) This expiration date will be identified by a
+#	unique pair of characters in columns 1 and 2 as shown below.
+#	In the unlikely event that a leap second is announced with an 
+#	effective date other than 30 June or 31 December, then this
+#	file will be edited to include that leap second as soon as it is
+#	announced or at least one month before the effective date
+#	(whichever is later). 
+#	If an announcement by the IERS specifies that no leap second is 
+#	scheduled, then only the expiration date of the file will 
+#	be advanced to show that the information in the file is still
+#	current -- the update time stamp, the data and the name of the file 
+#	will not change.
+#
+#	Updated through IERS Bulletin C 50
+#	File expires on:  1 Jun 2016
+#
+#@	3673728000
+#
+2272060800	10	# 1 Jan 1972
+2287785600	11	# 1 Jul 1972
+2303683200	12	# 1 Jan 1973
+2335219200	13	# 1 Jan 1974
+2366755200	14	# 1 Jan 1975
+2398291200	15	# 1 Jan 1976
+2429913600	16	# 1 Jan 1977
+2461449600	17	# 1 Jan 1978
+2492985600	18	# 1 Jan 1979
+2524521600	19	# 1 Jan 1980
+2571782400	20	# 1 Jul 1981
+2603318400	21	# 1 Jul 1982
+2634854400	22	# 1 Jul 1983
+2698012800	23	# 1 Jul 1985
+2776982400	24	# 1 Jan 1988
+2840140800	25	# 1 Jan 1990
+2871676800	26	# 1 Jan 1991
+2918937600	27	# 1 Jul 1992
+2950473600	28	# 1 Jul 1993
+2982009600	29	# 1 Jul 1994
+3029443200	30	# 1 Jan 1996
+3076704000	31	# 1 Jul 1997
+3124137600	32	# 1 Jan 1999
+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
+#	use the secure hash algorithm as specified
+#	by FIPS 180-1. See the files in ~/sha for
+#	the details of how this hash value is
+#	computed. Note that the hash computation
+#	ignores comments and whitespace characters
+#	in data lines. It includes the NTP values
+#	of both the last modification time and the 
+#	expiration time of the file, but not the
+#	white space on those lines.
+#	the hash line is also ignored in the
+#	computation.
+#
+#h	44a44c49 35b22601 a9c7054c 8c56cf57 9b6f6ed5
+#