diff --git a/lib/time/update.bash b/lib/time/update.bash
index b1f9a93061..6261f81dcd 100755
--- a/lib/time/update.bash
+++ b/lib/time/update.bash
@@ -8,8 +8,8 @@
 # Consult http://www.iana.org/time-zones for the latest versions.
 
 # Versions to use.
-CODE=2016j
-DATA=2016j
+CODE=2017b
+DATA=2017b
 
 set -e
 rm -rf work
diff --git a/lib/time/zoneinfo.zip b/lib/time/zoneinfo.zip
index d33dc1d273..b60ae7f98e 100644
Binary files a/lib/time/zoneinfo.zip and b/lib/time/zoneinfo.zip differ
diff --git a/src/time/zoneinfo_test.go b/src/time/zoneinfo_test.go
index b25733c1f6..452262f2ca 100644
--- a/src/time/zoneinfo_test.go
+++ b/src/time/zoneinfo_test.go
@@ -87,8 +87,8 @@ func TestFirstZone(t *testing.T) {
 		{
 			"Pacific/Fakaofo",
 			1325242799,
-			"Thu, 29 Dec 2011 23:59:59 -1100 (TKT)",
-			"Sat, 31 Dec 2011 00:00:00 +1300 (TKT)",
+			"Thu, 29 Dec 2011 23:59:59 -1100 (-11)",
+			"Sat, 31 Dec 2011 00:00:00 +1300 (+13)",
 		},
 	}