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-rw-r--r--tools/java/org/unicode/cldr/util/data/leapseconds12
1 files changed, 8 insertions, 4 deletions
diff --git a/tools/java/org/unicode/cldr/util/data/leapseconds b/tools/java/org/unicode/cldr/util/data/leapseconds
index 3b9cc7b2..bf0d2d74 100644
--- a/tools/java/org/unicode/cldr/util/data/leapseconds
+++ b/tools/java/org/unicode/cldr/util/data/leapseconds
@@ -6,6 +6,10 @@
# NIST format leap-seconds.list file, which can be copied from
# <ftp://ftp.nist.gov/pub/time/leap-seconds.list>
# or <ftp://ftp.boulder.nist.gov/pub/time/leap-seconds.list>.
+# The NIST file is used instead of its IERS upstream counterpart
+# <https://hpiers.obspm.fr/iers/bul/bulc/ntp/leap-seconds.list>
+# because under US law the NIST file is public domain
+# whereas the IERS file's copyright and license status is unclear.
# For more about leap-seconds.list, please see
# The NTP Timescale and Leap Seconds
# <https://www.eecis.udel.edu/~mills/leap.html>.
@@ -68,11 +72,11 @@ Leap 2016 Dec 31 23:59:60 + S
# 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 2020 Dec 28 00:00:00
+#Expires 2021 Jun 28 00:00:00
# POSIX timestamps for the data in this file:
#updated 1467936000 (2016-07-08 00:00:00 UTC)
-#expires 1609113600 (2020-12-28 00:00:00 UTC)
+#expires 1624838400 (2021-06-28 00:00:00 UTC)
-# Updated through IERS Bulletin C59
-# File expires on: 28 December 2020
+# Updated through IERS Bulletin C60
+# File expires on: 28 June 2021