diff --git a/common/supplemental/metaZones.xml b/common/supplemental/metaZones.xml
index c9a25b9ca6c..d88f170f558 100644
--- a/common/supplemental/metaZones.xml
+++ b/common/supplemental/metaZones.xml
@@ -1175,15 +1175,9 @@ For terms of use, see http://www.unicode.org/copyright.html
 			<timezone type="Australia/Sydney">
 				<usesMetazone mzone="Australia_Eastern"/>
 			</timezone>
-			<timezone type="CST6CDT">
-				<usesMetazone mzone="America_Central"/>
-			</timezone>
 			<timezone type="Etc/GMT">
 				<usesMetazone mzone="GMT"/>
 			</timezone>
-			<timezone type="EST5EDT">
-				<usesMetazone mzone="America_Eastern"/>
-			</timezone>
 			<timezone type="Europe/Amsterdam">
 				<usesMetazone mzone="Europe_Central"/>
 			</timezone>
@@ -1421,9 +1415,6 @@ For terms of use, see http://www.unicode.org/copyright.html
 			<timezone type="Indian/Reunion">
 				<usesMetazone mzone="Reunion"/>
 			</timezone>
-			<timezone type="MST7MDT">
-				<usesMetazone mzone="America_Mountain"/>
-			</timezone>
 			<timezone type="Pacific/Apia">
 				<usesMetazone mzone="Apia"/>
 			</timezone>
@@ -1545,9 +1536,6 @@ For terms of use, see http://www.unicode.org/copyright.html
 			<timezone type="Pacific/Wallis">
 				<usesMetazone mzone="Wallis"/>
 			</timezone>
-			<timezone type="PST8PDT">
-				<usesMetazone mzone="America_Pacific"/>
-			</timezone>
 		</metazoneInfo>
 
 		<mapTimezones type="metazones" typeVersion="2018e">
diff --git a/common/supplemental/windowsZones.xml b/common/supplemental/windowsZones.xml
index a81d0beb83c..b83e70ab5a3 100644
--- a/common/supplemental/windowsZones.xml
+++ b/common/supplemental/windowsZones.xml
@@ -59,7 +59,6 @@ For terms of use, see http://www.unicode.org/copyright.html
 			<mapZone other="Pacific Standard Time" territory="001" type="America/Los_Angeles"/>
 			<mapZone other="Pacific Standard Time" territory="CA" type="America/Vancouver"/>
 			<mapZone other="Pacific Standard Time" territory="US" type="America/Los_Angeles"/>
-			<mapZone other="Pacific Standard Time" territory="ZZ" type="PST8PDT"/>
 
 			<!-- (UTC-07:00) Arizona -->
 			<mapZone other="US Mountain Standard Time" territory="001" type="America/Phoenix"/>
@@ -77,7 +76,6 @@ For terms of use, see http://www.unicode.org/copyright.html
 			<mapZone other="Mountain Standard Time" territory="CA" type="America/Edmonton America/Cambridge_Bay America/Inuvik"/>
 			<mapZone other="Mountain Standard Time" territory="MX" type="America/Ciudad_Juarez"/>
 			<mapZone other="Mountain Standard Time" territory="US" type="America/Denver America/Boise"/>
-			<mapZone other="Mountain Standard Time" territory="ZZ" type="MST7MDT"/>
 
 			<!-- (UTC-07:00) Yukon -->
 			<mapZone other="Yukon Standard Time" territory="001" type="America/Whitehorse"/>
@@ -99,7 +97,6 @@ For terms of use, see http://www.unicode.org/copyright.html
 			<mapZone other="Central Standard Time" territory="CA" type="America/Winnipeg America/Rankin_Inlet America/Resolute"/>
 			<mapZone other="Central Standard Time" territory="MX" type="America/Matamoros America/Ojinaga"/>
 			<mapZone other="Central Standard Time" territory="US" type="America/Chicago America/Indiana/Knox America/Indiana/Tell_City America/Menominee America/North_Dakota/Beulah America/North_Dakota/Center America/North_Dakota/New_Salem"/>
-			<mapZone other="Central Standard Time" territory="ZZ" type="CST6CDT"/>
 
 			<!-- (UTC-06:00) Easter Island -->
 			<mapZone other="Easter Island Standard Time" territory="001" type="Pacific/Easter"/>
@@ -134,7 +131,6 @@ For terms of use, see http://www.unicode.org/copyright.html
 			<mapZone other="Eastern Standard Time" territory="BS" type="America/Nassau"/>
 			<mapZone other="Eastern Standard Time" territory="CA" type="America/Toronto America/Iqaluit"/>
 			<mapZone other="Eastern Standard Time" territory="US" type="America/New_York America/Detroit America/Indiana/Petersburg America/Indiana/Vincennes America/Indiana/Winamac America/Kentucky/Monticello America/Louisville"/>
-			<mapZone other="Eastern Standard Time" territory="ZZ" type="EST5EDT"/>
 
 			<!-- (UTC-05:00) Haiti -->
 			<mapZone other="Haiti Standard Time" territory="001" type="America/Port-au-Prince"/>