--- a/make/data/tzdata/zone.tab	Tue Nov 07 23:18:16 2017 +0100
+++ b/make/data/tzdata/zone.tab	Thu Nov 09 14:38:54 2017 +0530
@@ -209,7 +209,7 @@
 GD	+1203-06145	America/Grenada
 GE	+4143+04449	Asia/Tbilisi
 GF	+0456-05220	America/Cayenne
-GG	+4927-00232	Europe/Guernsey
+GG	+492717-0023210	Europe/Guernsey
 GH	+0533-00013	Africa/Accra
 GI	+3608-00521	Europe/Gibraltar
 GL	+6411-05144	America/Godthab	Greenland (most areas)
@@ -244,7 +244,7 @@
 IR	+3540+05126	Asia/Tehran
 IS	+6409-02151	Atlantic/Reykjavik
 IT	+4154+01229	Europe/Rome
-JE	+4912-00207	Europe/Jersey
+JE	+491101-0020624	Europe/Jersey
 JM	+175805-0764736	America/Jamaica
 JO	+3157+03556	Asia/Amman
 JP	+353916+1394441	Asia/Tokyo