diff --git a/make/data/cldr/common/dtd/ldmlSupplemental.dtd b/make/data/cldr/common/dtd/ldmlSupplemental.dtd
index e0258ed7f34b..e22c59401e9c 100644
--- a/make/data/cldr/common/dtd/ldmlSupplemental.dtd
+++ b/make/data/cldr/common/dtd/ldmlSupplemental.dtd
@@ -927,6 +927,12 @@ Except as contained in this notice, the name of a copyright holder shall not be
 <!ATTLIST usesMetazone mzone NMTOKEN #REQUIRED >
     <!--@MATCH:metazone-->
     <!--@VALUE-->
+<!ATTLIST usesMetazone stdOffset CDATA #IMPLIED >
+    <!--@MATCH:regex/[+-][0-9]{2}(:[0-9]{2})?-->
+    <!--@VALUE-->
+<!ATTLIST usesMetazone dstOffset CDATA #IMPLIED >
+    <!--@MATCH:regex/[+-][0-9]{2}(:[0-9]{2})?-->
+    <!--@VALUE-->
 
 <!ELEMENT plurals ( pluralRules*, pluralRanges* ) >
 <!ATTLIST plurals type (ordinal | cardinal) #IMPLIED >
diff --git a/make/data/cldr/common/supplemental/metaZones.xml b/make/data/cldr/common/supplemental/metaZones.xml
index 6e22fb49160e..efc8f569159b 100644
--- a/make/data/cldr/common/supplemental/metaZones.xml
+++ b/make/data/cldr/common/supplemental/metaZones.xml
@@ -187,7 +187,7 @@ For terms of use, see http://www.unicode.org/copyright.html
 			<timezone type="Africa/Windhoek">
 				<usesMetazone to="1990-03-20 22:00" mzone="Africa_Southern"/>
 				<usesMetazone to="1994-03-20 22:00" from="1990-03-20 22:00" mzone="Africa_Central"/>
-				<usesMetazone to="2017-10-23 22:00" from="1994-03-20 22:00" mzone="Africa_Western"/>
+				<usesMetazone to="2017-10-23 22:00" from="1994-03-20 22:00" mzone="Africa_Western" stdOffset="+01" dstOffset="+02"/>
 				<usesMetazone from="2017-10-23 22:00" mzone="Africa_Central"/>
 			</timezone>
 			<timezone type="America/Adak">
@@ -753,7 +753,7 @@ For terms of use, see http://www.unicode.org/copyright.html
 				<usesMetazone mzone="Atlantic"/>
 			</timezone>
 			<timezone type="America/Vancouver">
-				<usesMetazone mzone="America_Pacific"/>
+				<usesMetazone mzone="America_Pacific" stdOffset="-08" dstOffset="-07"/>
 			</timezone>
 			<timezone type="America/Whitehorse">
 				<usesMetazone to="2020-11-01 07:00" mzone="America_Pacific"/>
@@ -1241,8 +1241,8 @@ For terms of use, see http://www.unicode.org/copyright.html
 				<usesMetazone mzone="Europe_Central"/>
 			</timezone>
 			<timezone type="Europe/Dublin">
-				<usesMetazone mzone="Irish" to="1971-10-31 02:00"/>
-				<usesMetazone mzone="GMT" from="1971-10-31 02:00"/>
+				<usesMetazone mzone="Irish" to="1971-10-31 02:00" stdOffset="+00" dstOffset="+01"/>
+				<usesMetazone mzone="GMT" from="1971-10-31 02:00" stdOffset="+00" dstOffset="+01"/>
 			</timezone>
 			<timezone type="Europe/Gibraltar">
 				<usesMetazone mzone="Europe_Central"/>
diff --git a/test/jdk/java/time/test/java/time/format/TestZoneTextPrinterParser.java b/test/jdk/java/time/test/java/time/format/TestZoneTextPrinterParser.java
index 04253f3e94b4..b9dc3874caf1 100644
--- a/test/jdk/java/time/test/java/time/format/TestZoneTextPrinterParser.java
+++ b/test/jdk/java/time/test/java/time/format/TestZoneTextPrinterParser.java
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2012, 2022, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2012, 2026, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -50,6 +50,7 @@
 /*
  * @test
  * @bug 8081022 8151876 8166875 8189784 8206980 8278434
+ *      8390388
  * @key randomness
  */
 
@@ -86,10 +87,16 @@ public void test_printText() {
                 }
                 zdt = zdt.withZoneSameLocal(ZoneId.of(zid));
                 TimeZone tz = TimeZone.getTimeZone(zid);
-                boolean isDST = tz.inDaylightTime(new Date(zdt.toInstant().toEpochMilli()));
+                long epochMilli = zdt.toInstant().toEpochMilli();
+                boolean isDST = tz.inDaylightTime(new Date(epochMilli));
+                // Some zones now use an explicit daylight offset in CLDR without java.util.TimeZone
+                // reporting DST for the instant, so prefer the daylight name when the effective
+                // offset is greater than the raw standard offset.
+                boolean useDaylightName = isDST
+                        || (tz.getDSTSavings() == 0 && tz.getOffset(epochMilli) > tz.getRawOffset());
                 for (Locale locale : SAMPLE_LOCALES) {
-                    String longDisplayName = tz.getDisplayName(isDST, TimeZone.LONG, locale);
-                    String shortDisplayName = tz.getDisplayName(isDST, TimeZone.SHORT, locale);
+                    String longDisplayName = tz.getDisplayName(useDaylightName, TimeZone.LONG, locale);
+                    String shortDisplayName = tz.getDisplayName(useDaylightName, TimeZone.SHORT, locale);
                     if ((longDisplayName.startsWith("GMT+") && shortDisplayName.startsWith("GMT+"))
                             || (longDisplayName.startsWith("GMT-") && shortDisplayName.startsWith("GMT-"))) {
                         printText(locale, zdt, TextStyle.FULL, tz, tz.getID());
@@ -97,9 +104,9 @@ public void test_printText() {
                         continue;
                     }
                     printText(locale, zdt, TextStyle.FULL, tz,
-                            tz.getDisplayName(isDST, TimeZone.LONG, locale));
+                            tz.getDisplayName(useDaylightName, TimeZone.LONG, locale));
                     printText(locale, zdt, TextStyle.SHORT, tz,
-                            tz.getDisplayName(isDST, TimeZone.SHORT, locale));
+                            tz.getDisplayName(useDaylightName, TimeZone.SHORT, locale));
                 }
             }
         }
diff --git a/test/jdk/sun/util/resources/cldr/TimeZoneNamesTest.java b/test/jdk/sun/util/resources/cldr/TimeZoneNamesTest.java
index 29dca4acdfa1..576788f2948d 100644
--- a/test/jdk/sun/util/resources/cldr/TimeZoneNamesTest.java
+++ b/test/jdk/sun/util/resources/cldr/TimeZoneNamesTest.java
@@ -24,7 +24,7 @@
  /*
  * @test
  * @bug 8181157 8202537 8234347 8236548 8261279 8293834
- *      8381379
+ *      8381379 8390388
  * @modules jdk.localedata
  * @summary Checks CLDR time zone names are generated correctly at runtime
  * @run junit/othervm -Djava.locale.providers=CLDR TimeZoneNamesTest
@@ -208,9 +208,7 @@ private static Stream<Arguments> explicitDstOffsets() {
             Arguments.of(ZonedDateTime.of(2026, 4, 5, 0, 0, 0, 0, ZoneId.of("Eire")), "Irish Standard Time"),
             Arguments.of(ZonedDateTime.of(2026, 12, 5, 0, 0, 0, 0, ZoneId.of("Eire")), "Greenwich Mean Time"),
             Arguments.of(ZonedDateTime.of(2026, 4, 5, 0, 0, 0, 0, ZoneId.of("America/Vancouver")), "Pacific Daylight Time"),
-            // This needs to change once TZDB adopts -7 offset year round, and CLDR uses explicit dst offset
-            // namely, "Pacific Standard Time" -> "Pacific Daylight Time"
-            Arguments.of(ZonedDateTime.of(2026, 12, 5, 0, 0, 0, 0, ZoneId.of("America/Vancouver")), "Pacific Standard Time")
+            Arguments.of(ZonedDateTime.of(2026, 12, 5, 0, 0, 0, 0, ZoneId.of("America/Vancouver")), "Pacific Daylight Time")
         );
     }