--- a/make/data/tzdata/leapseconds	Tue Jan 30 19:13:26 2018 -0800
+++ b/make/data/tzdata/leapseconds	Wed Jan 31 22:55:12 2018 -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