--- old/src/jdk.localedata/share/classes/sun/util/resources/ext/TimeZoneNames_ja.java	2020-04-27 10:27:33.879379556 +0000
+++ new/src/jdk.localedata/share/classes/sun/util/resources/ext/TimeZoneNames_ja.java	2020-04-27 10:27:33.471358984 +0000
@@ -430,7 +430,7 @@
             {"America/Cuiaba", AMT},
             {"America/Curacao", AST},
             {"America/Danmarkshavn", GMT},
-            {"America/Dawson", PST},
+            {"America/Dawson", MST},
             {"America/Dawson_Creek", MST},
             {"America/Detroit", EST},
             {"America/Dominica", AST},
@@ -551,7 +551,7 @@
             {"America/Tortola", AST},
             {"America/Vancouver", PST},
             {"America/Virgin", AST},
-            {"America/Whitehorse", PST},
+            {"America/Whitehorse", MST},
             {"America/Winnipeg", CST},
             {"America/Yakutat", AKST},
             {"America/Yellowknife", MST},
@@ -782,7 +782,7 @@
             {"Canada/Mountain", MST},
             {"Canada/Newfoundland", NST},
             {"Canada/Pacific", PST},
-            {"Canada/Yukon", PST},
+            {"Canada/Yukon", MST},
             {"Canada/Saskatchewan", CST},
             {"CAT", CAT},
             {"CET", CET},