--- old/make/data/tzdata/leapseconds	2018-01-26 14:28:32.366033847 -0800
+++ new/make/data/tzdata/leapseconds	2018-01-26 14:28:32.174033847 -0800
@@ -80,5 +80,5 @@
 Leap	2015	Jun	30	23:59:60	+	S
 Leap	2016	Dec	31	23:59:60	+	S
 
-#	Updated through IERS Bulletin C54
-#	File expires on:  28 June 2018
+#	Updated through IERS Bulletin C55
+#	File expires on:  28 December 2018