diff --git a/commons-fileupload2-core/pom.xml b/commons-fileupload2-core/pom.xml
index 5c79664cdb..37cfba18d5 100644
--- a/commons-fileupload2-core/pom.xml
+++ b/commons-fileupload2-core/pom.xml
@@ -36,6 +36,7 @@
   <properties>
 	<commons.parent.dir>${basedir}/..</commons.parent.dir>
 	<commons.module.name>org.apache.commons.fileupload2.core</commons.module.name>
+    <!-- project.build.outputTimestamp is managed by Maven plugins, see https://maven.apache.org/guides/mini/guide-reproducible-builds.html -->
     <project.build.outputTimestamp>2024-01-01T00:00:00Z</project.build.outputTimestamp>
     <!-- JaCoCo: Don't make code coverage worse than: -->
     <commons.jacoco.classRatio>0.46</commons.jacoco.classRatio>
diff --git a/commons-fileupload2-distribution/pom.xml b/commons-fileupload2-distribution/pom.xml
index 06405b8468..2b33fb9284 100644
--- a/commons-fileupload2-distribution/pom.xml
+++ b/commons-fileupload2-distribution/pom.xml
@@ -37,6 +37,7 @@ limitations under the License.
     <checkstyle.skip>true</checkstyle.skip>
 	<commons.parent.dir>${basedir}/..</commons.parent.dir>
     <commons.release.isDistModule>true</commons.release.isDistModule>
+    <!-- project.build.outputTimestamp is managed by Maven plugins, see https://maven.apache.org/guides/mini/guide-reproducible-builds.html -->
     <project.build.outputTimestamp>2024-01-01T00:00:00Z</project.build.outputTimestamp>
   </properties>
 
diff --git a/commons-fileupload2-jakarta-servlet5/pom.xml b/commons-fileupload2-jakarta-servlet5/pom.xml
index 877b2ecc8c..0ef338c9b9 100644
--- a/commons-fileupload2-jakarta-servlet5/pom.xml
+++ b/commons-fileupload2-jakarta-servlet5/pom.xml
@@ -40,6 +40,7 @@
     <commons.osgi.requireCapability>osgi.contract;filter:="(&amp;(osgi.contract=JakartaServlet)(version=5.0))"</commons.osgi.requireCapability>
 	<!-- Override link to Jakarta EE -->
 	<commons.javadoc.javaee.link>https://jakarta.ee/specifications/platform/9.1/apidocs/</commons.javadoc.javaee.link>
+    <!-- project.build.outputTimestamp is managed by Maven plugins, see https://maven.apache.org/guides/mini/guide-reproducible-builds.html -->
     <project.build.outputTimestamp>2024-01-01T00:00:00Z</project.build.outputTimestamp>
     <!-- JaCoCo: Don't make code coverage worse than: -->
     <commons.jacoco.classRatio>0.75</commons.jacoco.classRatio>
diff --git a/commons-fileupload2-jakarta-servlet6/pom.xml b/commons-fileupload2-jakarta-servlet6/pom.xml
index 7bf7c9a6d2..4bbd02999a 100644
--- a/commons-fileupload2-jakarta-servlet6/pom.xml
+++ b/commons-fileupload2-jakarta-servlet6/pom.xml
@@ -40,6 +40,7 @@
     <commons.osgi.requireCapability>osgi.contract;filter:="(&amp;(osgi.contract=JakartaServlet)(version=6.0))"</commons.osgi.requireCapability>
     <!-- Override link to Jakarta EE -->
     <commons.javadoc.javaee.link>https://jakarta.ee/specifications/platform/10/apidocs/</commons.javadoc.javaee.link>	
+    <!-- project.build.outputTimestamp is managed by Maven plugins, see https://maven.apache.org/guides/mini/guide-reproducible-builds.html -->
     <project.build.outputTimestamp>2024-01-01T00:00:00Z</project.build.outputTimestamp>
     <!-- JaCoCo: Don't make code coverage worse than: -->
     <commons.jacoco.classRatio>0.75</commons.jacoco.classRatio>
diff --git a/commons-fileupload2-javax/pom.xml b/commons-fileupload2-javax/pom.xml
index dc8d04871e..47501319ef 100644
--- a/commons-fileupload2-javax/pom.xml
+++ b/commons-fileupload2-javax/pom.xml
@@ -39,6 +39,7 @@
 	<!-- Override properties for the OSGi maven-bundle-plugin to generate proper manifest -->
     <commons.osgi.import>javax.servlet.*;version=${commons.servlet-api.version},*</commons.osgi.import>
     <commons.osgi.requireCapability>osgi.contract;filter:="(&amp;(osgi.contract=JavaServlet)(version=${commons.servlet-api.version}))"</commons.osgi.requireCapability>
+    <!-- project.build.outputTimestamp is managed by Maven plugins, see https://maven.apache.org/guides/mini/guide-reproducible-builds.html -->
     <project.build.outputTimestamp>2024-01-01T00:00:00Z</project.build.outputTimestamp>
     <!-- JaCoCo: Don't make code coverage worse than: -->
     <commons.jacoco.classRatio>0.75</commons.jacoco.classRatio>
diff --git a/commons-fileupload2-portlet/pom.xml b/commons-fileupload2-portlet/pom.xml
index 82d31fc4ea..1afc9139be 100644
--- a/commons-fileupload2-portlet/pom.xml
+++ b/commons-fileupload2-portlet/pom.xml
@@ -40,6 +40,7 @@
 	<!-- Override properties for the OSGi maven-bundle-plugin to generate proper manifest -->
     <commons.osgi.import>!javax.portlet,*</commons.osgi.import>
     <commons.osgi.dynamicImport>javax.portlet</commons.osgi.dynamicImport>
+    <!-- project.build.outputTimestamp is managed by Maven plugins, see https://maven.apache.org/guides/mini/guide-reproducible-builds.html -->
     <project.build.outputTimestamp>2024-01-01T00:00:00Z</project.build.outputTimestamp>
     <!-- JaCoCo: Don't make code coverage worse than: -->
     <commons.jacoco.classRatio>1.00</commons.jacoco.classRatio>
diff --git a/pom.xml b/pom.xml
index 1cec573a8b..9e13a3ac65 100644
--- a/pom.xml
+++ b/pom.xml
@@ -94,6 +94,7 @@
     <commons.rc.version>RC1</commons.rc.version>
     <commons.distSvnStagingUrl>scm:svn:https://dist.apache.org/repos/dist/dev/commons/${commons.componentid}</commons.distSvnStagingUrl>
     <commons.release.isDistModule>false</commons.release.isDistModule>
+    <!-- project.build.outputTimestamp is managed by Maven plugins, see https://maven.apache.org/guides/mini/guide-reproducible-builds.html -->
     <project.build.outputTimestamp>2024-01-01T00:00:00Z</project.build.outputTimestamp>
     <!-- JaCoCo: Don't make code coverage worse than: -->
     <commons.jacoco.haltOnFailure>true</commons.jacoco.haltOnFailure>