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-rw-r--r--leapseconds12
1 files changed, 9 insertions, 3 deletions
diff --git a/leapseconds b/leapseconds
index 7808df8f894f..3b9cc7b20317 100644
--- a/leapseconds
+++ b/leapseconds
@@ -64,9 +64,15 @@ 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 2020 Dec 28 00:00:00
+
# POSIX timestamps for the data in this file:
#updated 1467936000 (2016-07-08 00:00:00 UTC)
-#expires 1593302400 (2020-06-28 00:00:00 UTC)
+#expires 1609113600 (2020-12-28 00:00:00 UTC)
-# Updated through IERS Bulletin C58
-# File expires on: 28 June 2020
+# Updated through IERS Bulletin C59
+# File expires on: 28 December 2020