diff --git a/deps/icu-small/source/common/unicode/uvernum.h b/deps/icu-small/source/common/unicode/uvernum.h
index 9fc98e738070de..1cdf8912f94b6e 100644
--- a/deps/icu-small/source/common/unicode/uvernum.h
+++ b/deps/icu-small/source/common/unicode/uvernum.h
@@ -59,7 +59,7 @@
  *  This value will change in the subsequent releases of ICU
  *  @stable ICU 2.6
  */
-#define U_ICU_VERSION_MINOR_NUM 1
+#define U_ICU_VERSION_MINOR_NUM 2
 
 /** The current ICU patchlevel version as an integer.
  *  This value will change in the subsequent releases of ICU
@@ -132,7 +132,7 @@
  *  This value will change in the subsequent releases of ICU
  *  @stable ICU 2.4
  */
-#define U_ICU_VERSION "74.1"
+#define U_ICU_VERSION "74.2"
 
 /**
  * The current ICU library major version number as a string, for library name suffixes.
@@ -151,7 +151,7 @@
 /** Data version in ICU4C.
  * @internal ICU 4.4 Internal Use Only
  **/
-#define U_ICU_DATA_VERSION "74.1"
+#define U_ICU_DATA_VERSION "74.2"
 #endif  /* U_HIDE_INTERNAL_API */
 
 /*===========================================================================
diff --git a/deps/icu-small/source/data/in/icudt74l.dat.bz2 b/deps/icu-small/source/data/in/icudt74l.dat.bz2
index e299a5c8abfc02..67a0cf45606af3 100644
Binary files a/deps/icu-small/source/data/in/icudt74l.dat.bz2 and b/deps/icu-small/source/data/in/icudt74l.dat.bz2 differ
diff --git a/deps/icu-small/source/i18n/dtptngen.cpp b/deps/icu-small/source/i18n/dtptngen.cpp
index 2947672013e79d..aa23b7cd4a6148 100644
--- a/deps/icu-small/source/i18n/dtptngen.cpp
+++ b/deps/icu-small/source/i18n/dtptngen.cpp
@@ -1023,7 +1023,7 @@ struct DateTimePatternGenerator::AvailableFormatsSink : public ResourceSink {
     AvailableFormatsSink(DateTimePatternGenerator& _dtpg) : dtpg(_dtpg) {}
     virtual ~AvailableFormatsSink();
 
-    virtual void put(const char *key, ResourceValue &value, UBool isRoot,
+    virtual void put(const char *key, ResourceValue &value, UBool /*isRoot*/,
             UErrorCode &errorCode) override {
         const UnicodeString formatKey(key, -1, US_INV);
         if (!dtpg.isAvailableFormatSet(formatKey) ) {
@@ -1032,7 +1032,7 @@ struct DateTimePatternGenerator::AvailableFormatsSink : public ResourceSink {
             // derived from std patterns, but not a previous availableFormats entry:
             const UnicodeString& formatValue = value.getUnicodeString(errorCode);
             conflictingPattern.remove();
-            dtpg.addPatternWithSkeleton(formatValue, &formatKey, !isRoot, conflictingPattern, errorCode);
+            dtpg.addPatternWithSkeleton(formatValue, &formatKey, true, conflictingPattern, errorCode);
         }
     }
 };
diff --git a/test/fixtures/tz-version.txt b/test/fixtures/tz-version.txt
index cd9c3f6d6e52d0..04fe6744432fa4 100644
--- a/test/fixtures/tz-version.txt
+++ b/test/fixtures/tz-version.txt
@@ -1 +1 @@
-2023d
+2024a
diff --git a/test/parallel/test-icu-env.js b/test/parallel/test-icu-env.js
index d453281bd726f8..45b9fea8dbd8c8 100644
--- a/test/parallel/test-icu-env.js
+++ b/test/parallel/test-icu-env.js
@@ -123,19 +123,19 @@ if (isMockable) {
     locales.map((LANG) => runEnvOutside({ LANG, TZ: 'Europe/Zurich' }, 'new Date(333333333333).toLocaleString()')),
     [
       '7/25/1980, 1:35:33 AM',
-      '1980/7/25 1:35:33',
+      '1980/7/25 01:35:33',
       '25/7/1980, 1:35:33 am',
       '25/7/1980, 1:35:33',
-      '25/07/1980 1:35:33',
+      '25/07/1980 01:35:33',
       '٢٥‏/٧‏/١٩٨٠، ١:٣٥:٣٣ ص',
       '২৫/৭/১৯৮০, ১:৩৫:৩৩ AM',
-      '25.07.1980, 1:35:33',
-      '25/07/1980, 1:35:33',
+      '25.07.1980, 01:35:33',
+      '25/07/1980, 01:35:33',
       '25/7/1980، 1:35:33 AM',
       '25/7/1980, 01.35.33',
-      '25.7.1980, 1:35:33',
+      '25.7.1980, 01:35:33',
       '1980/7/25 1:35:33',
-      '25/7/1980 1:35:33',
+      '25/7/1980 01:35:33',
       '२५/७/१९८०, १:३५:३३ AM',
       '25/7/1980 1:35:33 AM',
     ]
diff --git a/tools/dep_updaters/update-icu.sh b/tools/dep_updaters/update-icu.sh
index 0f53d5cce85f5e..e79a6218307710 100755
--- a/tools/dep_updaters/update-icu.sh
+++ b/tools/dep_updaters/update-icu.sh
@@ -40,7 +40,7 @@ NEW_VERSION_TGZ="icu4c-${LOW_DASHED_NEW_VERSION}-src.tgz"
 
 NEW_VERSION_TGZ_URL="https://github.com/unicode-org/icu/releases/download/release-${DASHED_NEW_VERSION}/$NEW_VERSION_TGZ"
 
-NEW_VERSION_MD5="https://github.com/unicode-org/icu/releases/download/release-${DASHED_NEW_VERSION}/icu4c-${LOW_DASHED_NEW_VERSION}-src.md5"
+NEW_VERSION_MD5="https://github.com/unicode-org/icu/releases/download/release-${DASHED_NEW_VERSION}/icu4c-${LOW_DASHED_NEW_VERSION}-sources.md5"
 
 CHECKSUM=$(curl -sL "$NEW_VERSION_MD5" | grep "$NEW_VERSION_TGZ" | grep -v "\.asc$" | awk '{print $1}')
 
diff --git a/tools/icu/current_ver.dep b/tools/icu/current_ver.dep
index e7a01203021fee..9b937c67c137d8 100644
--- a/tools/icu/current_ver.dep
+++ b/tools/icu/current_ver.dep
@@ -1,6 +1,6 @@
 [
   {
-    "url": "https://github.com/unicode-org/icu/releases/download/release-74-1/icu4c-74_1-src.tgz",
-    "md5": "71e60b22697c4f35820a1897417dbab4"
+    "url": "https://github.com/unicode-org/icu/releases/download/release-74-2/icu4c-74_2-src.tgz",
+    "md5": "94c0b370f43123ea92b146ebea9c709d"
   }
 ]