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?? Editing: leapseconds

# Allowance for leap seconds added to each time zone file.

# This file is in the public domain.

# This file is generated automatically from the data in the public-domain
# NIST/IERS format leap-seconds.list file, which can be copied from
# <https://hpiers.obspm.fr/iers/bul/bulc/ntp/leap-seconds.list>
# or, in a variant with different comments, from
# <ftp://ftp.boulder.nist.gov/pub/time/leap-seconds.list>.
# For more about leap-seconds.list, please see
# The NTP Timescale and Leap Seconds
# <https://www.eecis.udel.edu/~mills/leap.html>.

# The rules for leap seconds are specified in Annex 1 (Time scales) of:
# Standard-frequency and time-signal emissions.
# International Telecommunication Union - Radiocommunication Sector
# (ITU-R) Recommendation TF.460-6 (02/2002)
# <https://www.itu.int/rec/R-REC-TF.460-6-200202-I/>.
# The International Earth Rotation and Reference Systems Service (IERS)
# periodically uses leap seconds to keep UTC to within 0.9 s of UT1
# (a proxy for Earth's angle in space as measured by astronomers)
# and publishes leap second data in a copyrighted file
# <https://hpiers.obspm.fr/iers/bul/bulc/Leap_Second.dat>.
# See: Levine J. Coordinated Universal Time and the leap second.
# URSI Radio Sci Bull. 2016;89(4):30-6. doi:10.23919/URSIRSB.2016.7909995
# <https://ieeexplore.ieee.org/document/7909995>.

# There were no leap seconds before 1972, as no official mechanism
# accounted for the discrepancy between atomic time (TAI) and the earth's
# rotation.  The first ("1 Jan 1972") data line in leap-seconds.list
# does not denote a leap second; it denotes the start of the current definition
# of UTC.

# All leap-seconds are Stationary (S) at the given UTC time.
# The correction (+ or -) is made at the given time, so in the unlikely
# event of a negative leap second, a line would look like this:
# Leap	YEAR	MON	DAY	23:59:59	-	S
# Typical lines look like this:
# Leap	YEAR	MON	DAY	23:59:60	+	S
Leap	1972	Jun	30	23:59:60	+	S
Leap	1972	Dec	31	23:59:60	+	S
Leap	1973	Dec	31	23:59:60	+	S
Leap	1974	Dec	31	23:59:60	+	S
Leap	1975	Dec	31	23:59:60	+	S
Leap	1976	Dec	31	23:59:60	+	S
Leap	1977	Dec	31	23:59:60	+	S
Leap	1978	Dec	31	23:59:60	+	S
Leap	1979	Dec	31	23:59:60	+	S
Leap	1981	Jun	30	23:59:60	+	S
Leap	1982	Jun	30	23:59:60	+	S
Leap	1983	Jun	30	23:59:60	+	S
Leap	1985	Jun	30	23:59:60	+	S
Leap	1987	Dec	31	23:59:60	+	S
Leap	1989	Dec	31	23:59:60	+	S
Leap	1990	Dec	31	23:59:60	+	S
Leap	1992	Jun	30	23:59:60	+	S
Leap	1993	Jun	30	23:59:60	+	S
Leap	1994	Jun	30	23:59:60	+	S
Leap	1995	Dec	31	23:59:60	+	S
Leap	1997	Jun	30	23:59:60	+	S
Leap	1998	Dec	31	23:59:60	+	S
Leap	2005	Dec	31	23:59:60	+	S
Leap	2008	Dec	31	23:59:60	+	S
Leap	2012	Jun	30	23:59:60	+	S
Leap	2015	Jun	30	23:59:60	+	S
Leap	2016	Dec	31	23:59:60	+	S

# UTC timestamp when this leap second list expires.
# Any additional leap seconds will come after this.
# This Expires line is commented out for now,
# so that pre-2020a zic implementations do not reject this file.
#Expires 2025	Dec	28	00:00:00

# POSIX timestamps for the data in this file:
#updated 1736208000 (2025-01-07 00:00:00 UTC)
#expires 1766880000 (2025-12-28 00:00:00 UTC)

#	Updated through IERS Bulletin C (https://hpiers.obspm.fr/iers/bul/bulc/bulletinc.dat)
#	File expires on 28 December 2025

Path:

usr / share / zoneinfo /

?? ..
?? Africa
?? America
?? Antarctica
?? Arctic
?? Asia
?? Atlantic
?? Australia
?? Brazil
?? CET
?? CST6CDT
?? Canada
?? Chile
?? Cuba
?? EET
?? EST
?? EST5EDT
?? Egypt
?? Eire
?? Etc
?? Europe
?? GB
?? GB-Eire
?? GMT
?? GMT+0
?? GMT-0
?? GMT0
?? Greenwich
?? HST
?? Hongkong
?? Iceland
?? Indian
?? Iran
?? Israel
?? Jamaica
?? Japan
?? Kwajalein
?? Libya
?? MET
?? MST
?? MST7MDT
?? Mexico
?? NZ
?? NZ-CHAT
?? Navajo
?? PRC
?? PST8PDT
?? Pacific
?? Poland
?? Portugal
?? ROC
?? ROK
?? Singapore
?? Turkey
?? UCT
?? US
?? UTC
?? Universal
?? W-SU
?? WET
?? Zulu
?? iso3166.tab
?? leap-seconds.list
?? leapseconds
?? posix
?? posixrules
?? right
?? tzdata.zi
?? zone.tab
?? zone1970.tab

?? Editing: leapseconds

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