diff --git a/icu4c/source/data/locales/sr.txt b/icu4c/source/data/locales/sr.txt
index 95697315cea..87a84a807b2 100644
--- a/icu4c/source/data/locales/sr.txt
+++ b/icu4c/source/data/locales/sr.txt
@@ -863,18 +863,18 @@ sr{
                         "д",
                     }
                     wide{
-                        "јануара",
-                        "фебруара",
-                        "марта",
-                        "априла",
-                        "маја",
-                        "јуна",
-                        "јула",
-                        "августа",
-                        "септембра",
-                        "октобра",
-                        "новембра",
-                        "децембра",
+                        "јануар",
+                        "фебруар",
+                        "март",
+                        "април",
+                        "мај",
+                        "јун",
+                        "јул",
+                        "август",
+                        "септембар",
+                        "октобар",
+                        "новембар",
+                        "децембар",
                     }
                 }
                 stand-alone{
diff --git a/icu4c/source/data/locales/sr_Latn.txt b/icu4c/source/data/locales/sr_Latn.txt
index 4f73e10cb77..f6c8fb79088 100644
--- a/icu4c/source/data/locales/sr_Latn.txt
+++ b/icu4c/source/data/locales/sr_Latn.txt
@@ -864,18 +864,18 @@ sr_Latn{
                         "d",
                     }
                     wide{
-                        "januara",
-                        "februara",
-                        "marta",
-                        "aprila",
-                        "maja",
-                        "juna",
-                        "jula",
-                        "avgusta",
-                        "septembra",
-                        "oktobra",
-                        "novembra",
-                        "decembra",
+                        "januar",
+                        "februar",
+                        "mart",
+                        "april",
+                        "maj",
+                        "jun",
+                        "jul",
+                        "avgust",
+                        "septembar",
+                        "oktobar",
+                        "novembar",
+                        "decembar",
                     }
                 }
                 stand-alone{
diff --git a/icu4c/source/data/misc/langInfo.txt b/icu4c/source/data/misc/langInfo.txt
index fbe18156cd8..efd8a38157d 100644
--- a/icu4c/source/data/misc/langInfo.txt
+++ b/icu4c/source/data/misc/langInfo.txt
@@ -2525,24 +2525,25 @@ f006f045f947fa49e13fe541ea4302e9
             "5",
             "6",
             "0123456",
-            "03",
-            "16",
-            "02",
-            "05",
             "04",
-            "012346",
+            "13",
+            "02",
+            "06",
+            "026",
+            "05",
+            "012345",
         }
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 00000000000000000000000000000000
 00000000000000000000000000000000
 00000000000000000000000000000000
 00000000000000000000000000000000
-0000000000000000000000000000000c
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@@ -2598,39 +2599,39 @@ f006f045f947fa49e13fe541ea4302e9
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-00000002010101000001010201000000
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 00010000000100010001000000010101
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@@ -2640,176 +2641,176 @@ f006f045f947fa49e13fe541ea4302e9
 00000000010000000001000000
         }
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+292a2bb026b122b205b30fb329b529b6
+2905b306b329b529b629b029b129b229
+1165f349e64aeba2b1ed1165ee5c012a
+8545167468e94c6174ee35116eec497a
+137a2ee134e21172f55d12e261fa3512
+7373f92975a42e763a7903e82aec26ee
+22f01161f23512ec61f23566356c1e6c
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+366a12f061f23512e261f23513e97379
+f235613e624e635a64906501e222e311
+61f23502e526ef32f41173f13501e822
+f61161f23505f709f726f822f91161f2
+35e82eed22f11161f2351165ee5d1161
+f23512e661f2350e7668ee4aee3eef82
+f2a0f30168287310e82910f229016242
+6510ee5c012a854216656ee74c6174ee
+3510ee20012a854c166174ee42656ee7
+49117ae848012a8554166962f448616e
+f3351166f24976327a3ee544e81168e9
+5d01e522f5116df33512e36de7351172
+f549682268346a3a6d4e7412ea6df335
+12f26de73501ee2af1116de735116df3
+3512ed6de735613062366512ed65ee5d
+12ec75f24912fa61f235
         }
     }
 }
diff --git a/icu4c/source/data/misc/supplementalData.txt b/icu4c/source/data/misc/supplementalData.txt
index 1ec38e1bc64..8487953b3e1 100644
--- a/icu4c/source/data/misc/supplementalData.txt
+++ b/icu4c/source/data/misc/supplementalData.txt
@@ -17555,7 +17555,7 @@ supplementalData:table(nofallback){
             matchVariable{
                 americas{"019"}
                 cnsar{"HK+MO"}
-                enUS{"AS+GU+MH+MP+PR+UM+US+VI"}
+                enUS{"AS+CA+GU+MH+MP+PH+PR+UM+US+VI"}
                 maghreb{"MA+DZ+TN+LY+MR+EH"}
             }
             paradigmLocales{
diff --git a/icu4c/source/test/testdata/localeMatcherTest.txt b/icu4c/source/test/testdata/localeMatcherTest.txt
index 38c3c5981a9..9d92efd2328 100644
--- a/icu4c/source/test/testdata/localeMatcherTest.txt
+++ b/icu4c/source/test/testdata/localeMatcherTest.txt
@@ -404,7 +404,7 @@ en >> it
 @supported=es-AR, es
 es-MX >> es-AR
 @supported=fr, en, en-GB
-en-CA >> en-GB
+en-CA >> en
 @supported=de-AT, de-DE, de-CH
 de >> de-DE
 
@@ -412,7 +412,7 @@ de >> de-DE
 @supported=es-AR, es
 es-MX >> es-AR
 @supported=fr, en, en-GB
-en-CA >> en-GB
+en-CA >> en
 @supported=de-AT, de-DE, de-CH
 de >> de-DE
 
@@ -837,7 +837,7 @@ pt-US, pt-PT >> pt
 
 ** test: TestScriptAndRegion
 @supported=en-GB, en
-en-CA >> en-GB
+en-CA >> en
 # fr-CA is a "close enough" match to "fr" to be returned in favor of "en-GB"
 @supported=fr, en-GB, en
 fr-CA, en-CA >> fr
@@ -846,7 +846,7 @@ zh-HK >> zh-Hant
 
 @favor=script
 @supported=en-GB, en
-en-CA >> en-GB
+en-CA >> en
 @supported=fr, en-GB, en
 fr-CA, en-CA >> fr
 @supported=zh-Hant, zh-TW
@@ -1306,7 +1306,6 @@ fr-CA >> und
 # Great Britain fallback
 en-AU >> en-GB
 en-BZ >> en-GB
-en-CA >> en-GB
 en-IN >> en-GB
 en-IE >> en-GB
 en-JM >> en-GB
@@ -1316,6 +1315,7 @@ en-TT >> en-GB
 en-ZA >> en-GB
 
 # United States fallback
+en-CA >> en-US
 en-US >> en-US
 en >> en-US
 
@@ -1325,7 +1325,7 @@ ja >> und
 fr-CA >> en-US
 en-AU >> en-GB
 en-BZ >> en-GB
-en-CA >> en-GB
+en-CA >> en-US
 en-IN >> en-GB
 en-IE >> en-GB
 en-JM >> en-GB
@@ -1877,10 +1877,10 @@ es-MX >> es-419
 
 ** test: testLooseMatchForEnglish_getBestMatches
 @supported=en, en-GB
-en-CA >> en-GB
+en-CA >> en
 
 @favor=script
-en-CA >> en-GB
+en-CA >> en
 
 ** test: testLooseMatchForChinese_getBestMatches
 @supported=zh
diff --git a/icu4j/main/shared/data/icudata.jar b/icu4j/main/shared/data/icudata.jar
index b8965a7193e..d9691aa08c2 100644
--- a/icu4j/main/shared/data/icudata.jar
+++ b/icu4j/main/shared/data/icudata.jar
@@ -1,3 +1,3 @@
 version https://git-lfs.github.com/spec/v1
-oid sha256:b7a56cb0519ca384bb5b6d273c74bf237853e9865b7151a8624816360321a35a
-size 13627867
+oid sha256:9a60e8eead3f049ca4c6f21983c05f172df6ed2f6d9e09603ed7d939435a32a1
+size 13627084
diff --git a/icu4j/main/shared/data/icutzdata.jar b/icu4j/main/shared/data/icutzdata.jar
index 39043812a77..ddde5fb10b2 100644
--- a/icu4j/main/shared/data/icutzdata.jar
+++ b/icu4j/main/shared/data/icutzdata.jar
@@ -1,3 +1,3 @@
 version https://git-lfs.github.com/spec/v1
-oid sha256:6f3d0856773cfb2db6c6a95efefcf2cec1145a691199cbb81583d6b416010068
-size 96356
+oid sha256:5138343516d6c1d0cc079f0f2c77b8bde76373a20ace379bc56d054f4a12922e
+size 96360
diff --git a/icu4j/main/shared/data/testdata.jar b/icu4j/main/shared/data/testdata.jar
index eddebbb336d..6f776e18e0f 100644
--- a/icu4j/main/shared/data/testdata.jar
+++ b/icu4j/main/shared/data/testdata.jar
@@ -1,3 +1,3 @@
 version https://git-lfs.github.com/spec/v1
-oid sha256:683ed2daa2eedcdf4795e98fc2f7295c1945d6e953e93881db8f8f85ff43dcbe
-size 829042
+oid sha256:ee3331f88ddca0a688515e392b913b2c3e4b040198489746e49f022943fe1239
+size 826063
diff --git a/icu4j/main/tests/core/src/com/ibm/icu/dev/test/util/LocaleMatcherTest.java b/icu4j/main/tests/core/src/com/ibm/icu/dev/test/util/LocaleMatcherTest.java
index 6760f2f0a90..f8bf9fdff75 100644
--- a/icu4j/main/tests/core/src/com/ibm/icu/dev/test/util/LocaleMatcherTest.java
+++ b/icu4j/main/tests/core/src/com/ibm/icu/dev/test/util/LocaleMatcherTest.java
@@ -492,7 +492,7 @@ public class LocaleMatcherTest extends TestFmwk {
         assertEquals("es_AR", matcher.getBestMatch("es_MX").toString());
 
         matcher = newLocaleMatcher("fr, en, en_GB");
-        assertEquals("en_GB", matcher.getBestMatch("en_CA").toString());
+        assertEquals("en", matcher.getBestMatch("en_CA").toString());
 
         matcher = newLocaleMatcher("de_AT, de_DE, de_CH");
         assertEquals("de_DE", matcher.getBestMatch("de").toString());
diff --git a/icu4j/main/tests/core/src/com/ibm/icu/dev/test/util/data/localeDistanceTest.txt b/icu4j/main/tests/core/src/com/ibm/icu/dev/test/util/data/localeDistanceTest.txt
index d8787d5f752..c4d43356684 100644
--- a/icu4j/main/tests/core/src/com/ibm/icu/dev/test/util/data/localeDistanceTest.txt
+++ b/icu4j/main/tests/core/src/com/ibm/icu/dev/test/util/data/localeDistanceTest.txt
@@ -30,7 +30,7 @@ zh-Hans ; 	en ; 	100
 
 en-US ; 	en-AU ; 	5  # across clusters
 en-VI ; 	en-GU ; 	4	# within cluster
-en-AU ; 	en-CA ; 	4	# within cluster
+en-AU ; 	en-CA ; 	5	# across cluster
 
 # testScript
 en-CA ; 	en-Cyrl ; 	100
diff --git a/icu4j/main/tests/core/src/com/ibm/icu/dev/test/util/data/localeMatcherTest.txt b/icu4j/main/tests/core/src/com/ibm/icu/dev/test/util/data/localeMatcherTest.txt
index 38c3c5981a9..9d92efd2328 100644
--- a/icu4j/main/tests/core/src/com/ibm/icu/dev/test/util/data/localeMatcherTest.txt
+++ b/icu4j/main/tests/core/src/com/ibm/icu/dev/test/util/data/localeMatcherTest.txt
@@ -404,7 +404,7 @@ en >> it
 @supported=es-AR, es
 es-MX >> es-AR
 @supported=fr, en, en-GB
-en-CA >> en-GB
+en-CA >> en
 @supported=de-AT, de-DE, de-CH
 de >> de-DE
 
@@ -412,7 +412,7 @@ de >> de-DE
 @supported=es-AR, es
 es-MX >> es-AR
 @supported=fr, en, en-GB
-en-CA >> en-GB
+en-CA >> en
 @supported=de-AT, de-DE, de-CH
 de >> de-DE
 
@@ -837,7 +837,7 @@ pt-US, pt-PT >> pt
 
 ** test: TestScriptAndRegion
 @supported=en-GB, en
-en-CA >> en-GB
+en-CA >> en
 # fr-CA is a "close enough" match to "fr" to be returned in favor of "en-GB"
 @supported=fr, en-GB, en
 fr-CA, en-CA >> fr
@@ -846,7 +846,7 @@ zh-HK >> zh-Hant
 
 @favor=script
 @supported=en-GB, en
-en-CA >> en-GB
+en-CA >> en
 @supported=fr, en-GB, en
 fr-CA, en-CA >> fr
 @supported=zh-Hant, zh-TW
@@ -1306,7 +1306,6 @@ fr-CA >> und
 # Great Britain fallback
 en-AU >> en-GB
 en-BZ >> en-GB
-en-CA >> en-GB
 en-IN >> en-GB
 en-IE >> en-GB
 en-JM >> en-GB
@@ -1316,6 +1315,7 @@ en-TT >> en-GB
 en-ZA >> en-GB
 
 # United States fallback
+en-CA >> en-US
 en-US >> en-US
 en >> en-US
 
@@ -1325,7 +1325,7 @@ ja >> und
 fr-CA >> en-US
 en-AU >> en-GB
 en-BZ >> en-GB
-en-CA >> en-GB
+en-CA >> en-US
 en-IN >> en-GB
 en-IE >> en-GB
 en-JM >> en-GB
@@ -1877,10 +1877,10 @@ es-MX >> es-419
 
 ** test: testLooseMatchForEnglish_getBestMatches
 @supported=en, en-GB
-en-CA >> en-GB
+en-CA >> en
 
 @favor=script
-en-CA >> en-GB
+en-CA >> en
 
 ** test: testLooseMatchForChinese_getBestMatches
 @supported=zh