diff --git a/icu4c/data/sh.txt b/icu4c/data/sh.txt
index c19d0ab3f60..d97c94bc363 100644
--- a/icu4c/data/sh.txt
+++ b/icu4c/data/sh.txt
@@ -219,22 +219,22 @@ sh {
             "{1} {0}",
     }
     DayAbbreviations { 
-            "Ned",
-            "Pon",
-            "Uto",
-            "Sre",
-            "\u010Cet",
-            "Pet",
-            "Sub",
+            "ned",
+            "pon",
+            "uto",
+            "sre",
+            "\u010Det",
+            "pet",
+            "sub",
     }
     DayNames { 
-            "Nedelja",
-            "Ponedeljak",
-            "Utorak",
-            "Sreda",
-            "\u010Cetvrtak",
-            "Petak",
-            "Subota",
+            "nedelja",
+            "ponedeljak",
+            "utorak",
+            "sreda",
+            "\u010Detvrtak",
+            "petak",
+            "subota",
     }
     Eras { 
             "p. n. e.",
@@ -308,33 +308,33 @@ sh {
     LocaleID { "1a" }
     LocaleString { "sh" }
     MonthAbbreviations { 
-            "Jan",
-            "Feb",
-            "Mar",
-            "Apr",
-            "Maj",
-            "Jun",
-            "Jul",
-            "Avg",
-            "Sep",
-            "Okt",
-            "Nov",
-            "Dec",
+            "jan",
+            "feb",
+            "mar",
+            "apr",
+            "maj",
+            "jun",
+            "jul",
+            "avg",
+            "sep",
+            "okt",
+            "nov",
+            "dec",
             "",
     }
     MonthNames { 
-            "Januar",
-            "Februar",
-            "Mart",
-            "April",
-            "Maj",
-            "Juni",
-            "Juli",
-            "Avgust",
-            "Septembar",
-            "Oktobar",
-            "Novembar",
-            "Decembar",
+            "januar",
+            "februar",
+            "mart",
+            "april",
+            "maj",
+            "juni",
+            "juli",
+            "avgust",
+            "septembar",
+            "oktobar",
+            "novembar",
+            "decembar",
             "",
     }
     NumberElements { 
diff --git a/icu4c/data/sr.txt b/icu4c/data/sr.txt
index 768aa976057..d5daf96d480 100644
--- a/icu4c/data/sr.txt
+++ b/icu4c/data/sr.txt
@@ -244,22 +244,22 @@ sr {
             "{1} {0}",
     }
     DayAbbreviations { 
-            "\u041D\u0435\u0434",
-            "\u041F\u043E\u043D",
-            "\u0423\u0442\u043E",
-            "\u0421\u0440\u0435",
-            "\u0427\u0435\u0442",
-            "\u041F\u0435\u0442",
-            "\u0421\u0443\u0431",
+            "\u043D\u0435\u0434",
+            "\u043F\u043E\u043D",
+            "\u0443\u0442\u043E",
+            "\u0441\u0440\u0435",
+            "\u0447\u0435\u0442",
+            "\u043F\u0435\u0442",
+            "\u0441\u0443\u0431",
     }
     DayNames { 
-            "\u041D\u0435\u0434\u0435\u0459\u0430",
-            "\u041F\u043E\u043D\u0435\u0434\u0435\u0459\u0430\u043A",
-            "\u0423\u0442\u043E\u0440\u0430\u043A",
-            "\u0421\u0440\u0435\u0434\u0430",
-            "\u0427\u0435\u0442\u0432\u0440\u0442\u0430\u043A",
-            "\u041F\u0435\u0442\u0430\u043A",
-            "\u0421\u0443\u0431\u043E\u0442\u0430",
+            "\u043D\u0435\u0434\u0435\u0459\u0430",
+            "\u043F\u043E\u043D\u0435\u0434\u0435\u0459\u0430\u043A",
+            "\u0443\u0442\u043E\u0440\u0430\u043A",
+            "\u0441\u0440\u0435\u0434\u0430",
+            "\u0447\u0435\u0442\u0432\u0440\u0442\u0430\u043A",
+            "\u043F\u0435\u0442\u0430\u043A",
+            "\u0441\u0443\u0431\u043E\u0442\u0430",
     }
     Eras { 
             "\u043F. \u043D. \u0435.",
@@ -333,33 +333,33 @@ Languages {
     LocaleID { "1a" }
     LocaleString { "sr" }
     MonthAbbreviations { 
-            "\u0408\u0430\u043D",
-            "\u0424\u0435\u0431",
-            "\u041C\u0430\u0440",
-            "\u0410\u043F\u0440",
-            "\u041C\u0430\u0458",
-            "\u0408\u0443\u043D",
-            "\u0408\u0443\u043B",
-            "\u0410\u0432\u0433",
-            "\u0421\u0435\u043F",
-            "\u041E\u043A\u0442",
-            "\u041D\u043E\u0432",
-            "\u0414\u0435\u0446",
+            "\u0458\u0430\u043D",
+            "\u0444\u0435\u0431",
+            "\u043C\u0430\u0440",
+            "\u0430\u043F\u0440",
+            "\u043C\u0430\u0458",
+            "\u0458\u0443\u043D",
+            "\u0458\u0443\u043B",
+            "\u0430\u0432\u0433",
+            "\u0441\u0435\u043F",
+            "\u043E\u043A\u0442",
+            "\u043D\u043E\u0432",
+            "\u0434\u0435\u0446",
             "",
     }
     MonthNames { 
-            "\u0408\u0430\u043D\u0443\u0430\u0440",
-            "\u0424\u0435\u0431\u0440\u0443\u0430\u0440",
-            "\u041C\u0430\u0440\u0442",
-            "\u0410\u043F\u0440\u0438\u043B",
-            "\u041C\u0430\u0458",
-            "\u0408\u0443\u043D\u0438",
-            "\u0408\u0443\u043B\u0438",
-            "\u0410\u0432\u0433\u0443\u0441\u0442",
-            "\u0421\u0435\u043F\u0442\u0435\u043C\u0431\u0430\u0440",
-            "\u041E\u043A\u0442\u043E\u0431\u0430\u0440",
-            "\u041D\u043E\u0432\u0435\u043C\u0431\u0430\u0440",
-            "\u0414\u0435\u0446\u0435\u043C\u0431\u0430\u0440",
+            "\u0458\u0430\u043D\u0443\u0430\u0440",
+            "\u0444\u0435\u0431\u0440\u0443\u0430\u0440",
+            "\u043C\u0430\u0440\u0442",
+            "\u0430\u043F\u0440\u0438\u043B",
+            "\u043C\u0430\u0458",
+            "\u0458\u0443\u043D\u0438",
+            "\u0458\u0443\u043B\u0438",
+            "\u0430\u0432\u0433\u0443\u0441\u0442",
+            "\u0441\u0435\u043F\u0442\u0435\u043C\u0431\u0430\u0440",
+            "\u043E\u043A\u0442\u043E\u0431\u0430\u0440",
+            "\u043D\u043E\u0432\u0435\u043C\u0431\u0430\u0440",
+            "\u0434\u0435\u0446\u0435\u043C\u0431\u0430\u0440",
             "",
     }
     NumberElements { 
diff --git a/icu4c/data/uk.txt b/icu4c/data/uk.txt
index 0bade6e4504..91d45c89be6 100644
--- a/icu4c/data/uk.txt
+++ b/icu4c/data/uk.txt
@@ -60,22 +60,22 @@ uk {
             "{1} {0}",
     }
     DayAbbreviations { 
-            "\u043D\u0434",
-            "\u043F\u043D",
-            "\u0432\u0442",
-            "\u0441\u0440",
-            "\u0447\u0442",
-            "\u043F\u0442",
-            "\u0441\u0431",
+            "\u041D\u0434",
+            "\u041F\u043D",
+            "\u0412\u0442",
+            "\u0421\u0440",
+            "\u0427\u0442",
+            "\u041F\u0442",
+            "\u0421\u0431",
     }
     DayNames { 
-            "\u043D\u0435\u0434\u0456\u043B\u044F",
-            "\u043F\u043E\u043D\u0435\u0434\u0456\u043B\u043E\u043A",
-            "\u0432\u0456\u0432\u0442\u043E\u0440\u043E\u043A",
-            "\u0441\u0435\u0440\u0435\u0434\u0430",
-            "\u0447\u0435\u0442\u0432\u0435\u0440",
-            "\u043F'\u044F\u0442\u043D\u0438\u0446\u044F",
-            "\u0441\u0443\u0431\u043E\u0442\u0430",
+            "\u041D\u0435\u0434\u0456\u043B\u044F",
+            "\u041F\u043E\u043D\u0435\u0434\u0456\u043B\u043E\u043A",
+            "\u0412\u0456\u0432\u0442\u043E\u0440\u043E\u043A",
+            "\u0421\u0435\u0440\u0435\u0434\u0430",
+            "\u0427\u0435\u0442\u0432\u0435\u0440",
+            "\u041F\u044F\u0442\u043D\u0438\u0446\u044F",
+            "\u0421\u0443\u0431\u043E\u0442\u0430",
     }
     Eras { 
             "\u0434\u043E \u043D.\u0435.",
@@ -87,33 +87,33 @@ uk {
     LocaleID { "22" }
     LocaleString { "uk" }
     MonthAbbreviations { 
-            "\u0441\u0456\u0447",
-            "\u043B\u044E\u0442",
-            "\u0431\u0435\u0440",
-            "\u043A\u0432\u0456\u0442",
-            "\u0442\u0440\u0430\u0432",
-            "\u0447\u0435\u0440\u0432",
-            "\u043B\u0438\u043F",
-            "\u0441\u0435\u0440\u043F",
-            "\u0432\u0435\u0440",
-            "\u0436\u043E\u0432\u0442",
-            "\u043B\u0438\u0441\u0442",
-            "\u0433\u0440\u0443\u0434",
+            "\u0421\u0456\u0447",
+            "\u041B\u044E\u0442",
+            "\u0411\u0435\u0440",
+            "\u041A\u0432\u0456\u0442",
+            "\u0422\u0440\u0430\u0432",
+            "\u0427\u0435\u0440\u0432",
+            "\u041B\u0438\u043F",
+            "\u0421\u0435\u0440\u043F",
+            "\u0412\u0435\u0440",
+            "\u0416\u043E\u0432\u0442",
+            "\u041B\u0438\u0441\u0442",
+            "\u0413\u0440\u0443\u0434",
             "",
     }
     MonthNames { 
-            "\u0441\u0456\u0447\u043D\u044F",
-            "\u043B\u044E\u0442\u043E\u0433\u043E",
-            "\u0431\u0435\u0440\u0435\u0436\u043D\u044F",
-            "\u043A\u0432\u0456\u0442\u043D\u044F",
-            "\u0442\u0440\u0430\u0432\u043D\u044F",
-            "\u0447\u0435\u0440\u0432\u043D\u044F",
-            "\u043B\u0438\u043F\u043D\u044F",
-            "\u0441\u0435\u0440\u043F\u043D\u044F",
-            "\u0432\u0435\u0440\u0435\u0441\u043D\u044F",
-            "\u0436\u043E\u0432\u0442\u043D\u044F",
-            "\u043B\u0438\u0441\u0442\u043E\u043F\u0430\u0434\u0430",
-            "\u0433\u0440\u0443\u0434\u043D\u044F",
+            "\u0421\u0456\u0447\u043D\u044F",
+            "\u041B\u044E\u0442\u043E\u0433\u043E",
+            "\u0411\u0435\u0440\u0435\u0436\u043D\u044F",
+            "\u041A\u0432\u0456\u0442\u043D\u044F",
+            "\u0422\u0440\u0430\u0432\u043D\u044F",
+            "\u0427\u0435\u0440\u0432\u043D\u044F",
+            "\u041B\u0438\u043F\u043D\u044F",
+            "\u0421\u0435\u0440\u043F\u043D\u044F",
+            "\u0412\u0435\u0440\u0435\u0441\u043D\u044F",
+            "\u0416\u043E\u0432\u0442\u043D\u044F",
+            "\u041B\u0438\u0441\u0442\u043E\u043F\u0430\u0434\u0430",
+            "\u0413\u0440\u0443\u0434\u043D\u044F",
             "",
     }
     NumberElements { 
diff --git a/icu4c/source/data/locales/sh.txt b/icu4c/source/data/locales/sh.txt
index c19d0ab3f60..d97c94bc363 100644
--- a/icu4c/source/data/locales/sh.txt
+++ b/icu4c/source/data/locales/sh.txt
@@ -219,22 +219,22 @@ sh {
             "{1} {0}",
     }
     DayAbbreviations { 
-            "Ned",
-            "Pon",
-            "Uto",
-            "Sre",
-            "\u010Cet",
-            "Pet",
-            "Sub",
+            "ned",
+            "pon",
+            "uto",
+            "sre",
+            "\u010Det",
+            "pet",
+            "sub",
     }
     DayNames { 
-            "Nedelja",
-            "Ponedeljak",
-            "Utorak",
-            "Sreda",
-            "\u010Cetvrtak",
-            "Petak",
-            "Subota",
+            "nedelja",
+            "ponedeljak",
+            "utorak",
+            "sreda",
+            "\u010Detvrtak",
+            "petak",
+            "subota",
     }
     Eras { 
             "p. n. e.",
@@ -308,33 +308,33 @@ sh {
     LocaleID { "1a" }
     LocaleString { "sh" }
     MonthAbbreviations { 
-            "Jan",
-            "Feb",
-            "Mar",
-            "Apr",
-            "Maj",
-            "Jun",
-            "Jul",
-            "Avg",
-            "Sep",
-            "Okt",
-            "Nov",
-            "Dec",
+            "jan",
+            "feb",
+            "mar",
+            "apr",
+            "maj",
+            "jun",
+            "jul",
+            "avg",
+            "sep",
+            "okt",
+            "nov",
+            "dec",
             "",
     }
     MonthNames { 
-            "Januar",
-            "Februar",
-            "Mart",
-            "April",
-            "Maj",
-            "Juni",
-            "Juli",
-            "Avgust",
-            "Septembar",
-            "Oktobar",
-            "Novembar",
-            "Decembar",
+            "januar",
+            "februar",
+            "mart",
+            "april",
+            "maj",
+            "juni",
+            "juli",
+            "avgust",
+            "septembar",
+            "oktobar",
+            "novembar",
+            "decembar",
             "",
     }
     NumberElements { 
diff --git a/icu4c/source/data/locales/sr.txt b/icu4c/source/data/locales/sr.txt
index 768aa976057..d5daf96d480 100644
--- a/icu4c/source/data/locales/sr.txt
+++ b/icu4c/source/data/locales/sr.txt
@@ -244,22 +244,22 @@ sr {
             "{1} {0}",
     }
     DayAbbreviations { 
-            "\u041D\u0435\u0434",
-            "\u041F\u043E\u043D",
-            "\u0423\u0442\u043E",
-            "\u0421\u0440\u0435",
-            "\u0427\u0435\u0442",
-            "\u041F\u0435\u0442",
-            "\u0421\u0443\u0431",
+            "\u043D\u0435\u0434",
+            "\u043F\u043E\u043D",
+            "\u0443\u0442\u043E",
+            "\u0441\u0440\u0435",
+            "\u0447\u0435\u0442",
+            "\u043F\u0435\u0442",
+            "\u0441\u0443\u0431",
     }
     DayNames { 
-            "\u041D\u0435\u0434\u0435\u0459\u0430",
-            "\u041F\u043E\u043D\u0435\u0434\u0435\u0459\u0430\u043A",
-            "\u0423\u0442\u043E\u0440\u0430\u043A",
-            "\u0421\u0440\u0435\u0434\u0430",
-            "\u0427\u0435\u0442\u0432\u0440\u0442\u0430\u043A",
-            "\u041F\u0435\u0442\u0430\u043A",
-            "\u0421\u0443\u0431\u043E\u0442\u0430",
+            "\u043D\u0435\u0434\u0435\u0459\u0430",
+            "\u043F\u043E\u043D\u0435\u0434\u0435\u0459\u0430\u043A",
+            "\u0443\u0442\u043E\u0440\u0430\u043A",
+            "\u0441\u0440\u0435\u0434\u0430",
+            "\u0447\u0435\u0442\u0432\u0440\u0442\u0430\u043A",
+            "\u043F\u0435\u0442\u0430\u043A",
+            "\u0441\u0443\u0431\u043E\u0442\u0430",
     }
     Eras { 
             "\u043F. \u043D. \u0435.",
@@ -333,33 +333,33 @@ Languages {
     LocaleID { "1a" }
     LocaleString { "sr" }
     MonthAbbreviations { 
-            "\u0408\u0430\u043D",
-            "\u0424\u0435\u0431",
-            "\u041C\u0430\u0440",
-            "\u0410\u043F\u0440",
-            "\u041C\u0430\u0458",
-            "\u0408\u0443\u043D",
-            "\u0408\u0443\u043B",
-            "\u0410\u0432\u0433",
-            "\u0421\u0435\u043F",
-            "\u041E\u043A\u0442",
-            "\u041D\u043E\u0432",
-            "\u0414\u0435\u0446",
+            "\u0458\u0430\u043D",
+            "\u0444\u0435\u0431",
+            "\u043C\u0430\u0440",
+            "\u0430\u043F\u0440",
+            "\u043C\u0430\u0458",
+            "\u0458\u0443\u043D",
+            "\u0458\u0443\u043B",
+            "\u0430\u0432\u0433",
+            "\u0441\u0435\u043F",
+            "\u043E\u043A\u0442",
+            "\u043D\u043E\u0432",
+            "\u0434\u0435\u0446",
             "",
     }
     MonthNames { 
-            "\u0408\u0430\u043D\u0443\u0430\u0440",
-            "\u0424\u0435\u0431\u0440\u0443\u0430\u0440",
-            "\u041C\u0430\u0440\u0442",
-            "\u0410\u043F\u0440\u0438\u043B",
-            "\u041C\u0430\u0458",
-            "\u0408\u0443\u043D\u0438",
-            "\u0408\u0443\u043B\u0438",
-            "\u0410\u0432\u0433\u0443\u0441\u0442",
-            "\u0421\u0435\u043F\u0442\u0435\u043C\u0431\u0430\u0440",
-            "\u041E\u043A\u0442\u043E\u0431\u0430\u0440",
-            "\u041D\u043E\u0432\u0435\u043C\u0431\u0430\u0440",
-            "\u0414\u0435\u0446\u0435\u043C\u0431\u0430\u0440",
+            "\u0458\u0430\u043D\u0443\u0430\u0440",
+            "\u0444\u0435\u0431\u0440\u0443\u0430\u0440",
+            "\u043C\u0430\u0440\u0442",
+            "\u0430\u043F\u0440\u0438\u043B",
+            "\u043C\u0430\u0458",
+            "\u0458\u0443\u043D\u0438",
+            "\u0458\u0443\u043B\u0438",
+            "\u0430\u0432\u0433\u0443\u0441\u0442",
+            "\u0441\u0435\u043F\u0442\u0435\u043C\u0431\u0430\u0440",
+            "\u043E\u043A\u0442\u043E\u0431\u0430\u0440",
+            "\u043D\u043E\u0432\u0435\u043C\u0431\u0430\u0440",
+            "\u0434\u0435\u0446\u0435\u043C\u0431\u0430\u0440",
             "",
     }
     NumberElements { 
diff --git a/icu4c/source/data/locales/uk.txt b/icu4c/source/data/locales/uk.txt
index 0bade6e4504..91d45c89be6 100644
--- a/icu4c/source/data/locales/uk.txt
+++ b/icu4c/source/data/locales/uk.txt
@@ -60,22 +60,22 @@ uk {
             "{1} {0}",
     }
     DayAbbreviations { 
-            "\u043D\u0434",
-            "\u043F\u043D",
-            "\u0432\u0442",
-            "\u0441\u0440",
-            "\u0447\u0442",
-            "\u043F\u0442",
-            "\u0441\u0431",
+            "\u041D\u0434",
+            "\u041F\u043D",
+            "\u0412\u0442",
+            "\u0421\u0440",
+            "\u0427\u0442",
+            "\u041F\u0442",
+            "\u0421\u0431",
     }
     DayNames { 
-            "\u043D\u0435\u0434\u0456\u043B\u044F",
-            "\u043F\u043E\u043D\u0435\u0434\u0456\u043B\u043E\u043A",
-            "\u0432\u0456\u0432\u0442\u043E\u0440\u043E\u043A",
-            "\u0441\u0435\u0440\u0435\u0434\u0430",
-            "\u0447\u0435\u0442\u0432\u0435\u0440",
-            "\u043F'\u044F\u0442\u043D\u0438\u0446\u044F",
-            "\u0441\u0443\u0431\u043E\u0442\u0430",
+            "\u041D\u0435\u0434\u0456\u043B\u044F",
+            "\u041F\u043E\u043D\u0435\u0434\u0456\u043B\u043E\u043A",
+            "\u0412\u0456\u0432\u0442\u043E\u0440\u043E\u043A",
+            "\u0421\u0435\u0440\u0435\u0434\u0430",
+            "\u0427\u0435\u0442\u0432\u0435\u0440",
+            "\u041F\u044F\u0442\u043D\u0438\u0446\u044F",
+            "\u0421\u0443\u0431\u043E\u0442\u0430",
     }
     Eras { 
             "\u0434\u043E \u043D.\u0435.",
@@ -87,33 +87,33 @@ uk {
     LocaleID { "22" }
     LocaleString { "uk" }
     MonthAbbreviations { 
-            "\u0441\u0456\u0447",
-            "\u043B\u044E\u0442",
-            "\u0431\u0435\u0440",
-            "\u043A\u0432\u0456\u0442",
-            "\u0442\u0440\u0430\u0432",
-            "\u0447\u0435\u0440\u0432",
-            "\u043B\u0438\u043F",
-            "\u0441\u0435\u0440\u043F",
-            "\u0432\u0435\u0440",
-            "\u0436\u043E\u0432\u0442",
-            "\u043B\u0438\u0441\u0442",
-            "\u0433\u0440\u0443\u0434",
+            "\u0421\u0456\u0447",
+            "\u041B\u044E\u0442",
+            "\u0411\u0435\u0440",
+            "\u041A\u0432\u0456\u0442",
+            "\u0422\u0440\u0430\u0432",
+            "\u0427\u0435\u0440\u0432",
+            "\u041B\u0438\u043F",
+            "\u0421\u0435\u0440\u043F",
+            "\u0412\u0435\u0440",
+            "\u0416\u043E\u0432\u0442",
+            "\u041B\u0438\u0441\u0442",
+            "\u0413\u0440\u0443\u0434",
             "",
     }
     MonthNames { 
-            "\u0441\u0456\u0447\u043D\u044F",
-            "\u043B\u044E\u0442\u043E\u0433\u043E",
-            "\u0431\u0435\u0440\u0435\u0436\u043D\u044F",
-            "\u043A\u0432\u0456\u0442\u043D\u044F",
-            "\u0442\u0440\u0430\u0432\u043D\u044F",
-            "\u0447\u0435\u0440\u0432\u043D\u044F",
-            "\u043B\u0438\u043F\u043D\u044F",
-            "\u0441\u0435\u0440\u043F\u043D\u044F",
-            "\u0432\u0435\u0440\u0435\u0441\u043D\u044F",
-            "\u0436\u043E\u0432\u0442\u043D\u044F",
-            "\u043B\u0438\u0441\u0442\u043E\u043F\u0430\u0434\u0430",
-            "\u0433\u0440\u0443\u0434\u043D\u044F",
+            "\u0421\u0456\u0447\u043D\u044F",
+            "\u041B\u044E\u0442\u043E\u0433\u043E",
+            "\u0411\u0435\u0440\u0435\u0436\u043D\u044F",
+            "\u041A\u0432\u0456\u0442\u043D\u044F",
+            "\u0422\u0440\u0430\u0432\u043D\u044F",
+            "\u0427\u0435\u0440\u0432\u043D\u044F",
+            "\u041B\u0438\u043F\u043D\u044F",
+            "\u0421\u0435\u0440\u043F\u043D\u044F",
+            "\u0412\u0435\u0440\u0435\u0441\u043D\u044F",
+            "\u0416\u043E\u0432\u0442\u043D\u044F",
+            "\u041B\u0438\u0441\u0442\u043E\u043F\u0430\u0434\u0430",
+            "\u0413\u0440\u0443\u0434\u043D\u044F",
             "",
     }
     NumberElements {