diff --git a/lib/tasks/replaceBuildtime.js b/lib/tasks/replaceBuildtime.js
index a8e685107..a1732d44f 100644
--- a/lib/tasks/replaceBuildtime.js
+++ b/lib/tasks/replaceBuildtime.js
@@ -5,13 +5,14 @@ function pad(v) {
 }
 function getTimestamp() {
 	const date = new Date();
-	const year = date.getFullYear();
-	const month = pad(date.getMonth() + 1);
-	const day = pad(date.getDate());
-	const hours = pad(date.getHours());
-	const minutes = pad(date.getMinutes());
-	// yyyyMMdd-HHmm
-	return year + month + day + "-" + hours + minutes;
+	const year = date.getUTCFullYear();
+	const month = pad(date.getUTCMonth() + 1);
+	const day = pad(date.getUTCDate());
+	const hours = pad(date.getUTCHours());
+	const minutes = pad(date.getUTCMinutes());
+	const seconds = pad(date.getUTCSeconds());
+	// yyyy-MM-dd'T'HH:mm:ss'Z'
+	return year + "-" + month + "-" + day + "T" + hours + ":" + minutes + ":" + seconds + "Z";
 }
 
 /**
diff --git a/test/expected/build/sap.ui.core-buildtime/dest/resources/sap/ui/Global-dbg.js b/test/expected/build/sap.ui.core-buildtime/dest/resources/sap/ui/Global-dbg.js
index 8a2077bdb..c1fbbb636 100644
--- a/test/expected/build/sap.ui.core-buildtime/dest/resources/sap/ui/Global-dbg.js
+++ b/test/expected/build/sap.ui.core-buildtime/dest/resources/sap/ui/Global-dbg.js
@@ -2,4 +2,4 @@
  * Some fancy copyright
  */
 // replacement of $\{buildtime\} is only made in sap/ui/Global.js and Global-dbg.js
-console.log('20220620-1630');
+console.log('2022-06-20T14:30:29Z');
diff --git a/test/expected/build/sap.ui.core-buildtime/dest/resources/sap/ui/Global.js b/test/expected/build/sap.ui.core-buildtime/dest/resources/sap/ui/Global.js
index b37fec15d..09d1b19e3 100644
--- a/test/expected/build/sap.ui.core-buildtime/dest/resources/sap/ui/Global.js
+++ b/test/expected/build/sap.ui.core-buildtime/dest/resources/sap/ui/Global.js
@@ -1,4 +1,4 @@
 /*!
  * Some fancy copyright
  */
-console.log("20220620-1630");
\ No newline at end of file
+console.log("2022-06-20T14:30:29Z");
\ No newline at end of file
diff --git a/test/lib/builder/builder.js b/test/lib/builder/builder.js
index b40fa6d45..644b14aa1 100644
--- a/test/lib/builder/builder.js
+++ b/test/lib/builder/builder.js
@@ -863,11 +863,12 @@ test.serial("Build library.coreBuildtime: replaceBuildtime", (t) => {
 	const expectedPath = path.join("test", "expected", "build", "sap.ui.core-buildtime", "dest");
 
 	const dateStubs = [
-		sinon.stub(Date.prototype, "getFullYear").returns(2022),
-		sinon.stub(Date.prototype, "getMonth").returns(5),
-		sinon.stub(Date.prototype, "getDate").returns(20),
-		sinon.stub(Date.prototype, "getHours").returns(16),
-		sinon.stub(Date.prototype, "getMinutes").returns(30),
+		sinon.stub(Date.prototype, "getUTCFullYear").returns(2022),
+		sinon.stub(Date.prototype, "getUTCMonth").returns(5),
+		sinon.stub(Date.prototype, "getUTCDate").returns(20),
+		sinon.stub(Date.prototype, "getUTCHours").returns(14),
+		sinon.stub(Date.prototype, "getUTCMinutes").returns(30),
+		sinon.stub(Date.prototype, "getUTCSeconds").returns(29)
 	];
 
 	return builder.build({
diff --git a/test/lib/tasks/replaceBuildtime.js b/test/lib/tasks/replaceBuildtime.js
index 3344b53b5..03eac21a1 100644
--- a/test/lib/tasks/replaceBuildtime.js
+++ b/test/lib/tasks/replaceBuildtime.js
@@ -15,7 +15,7 @@ test("integration: replace version", (t) => {
 
 	const content = "// timestamp: ${buildtime}";
 	const expectedPrefix = "// timestamp";
-	const expectedDatePattern = /^\d{8}-\d{4}$/;
+	const expectedDatePattern = /^\d{4}-\d{2}-\d{2}T\d{2}:\d{2}:\d{2}Z$/;
 
 	const resource = resourceFactory.createResource({
 		path: "/test.js",