--- jaxb-ri-4.0.5-RI/jaxb-ri/codemodel/codemodel/src/main/java/com/sun/codemodel/writer/LicenseCodeWriter.java	2025-07-17 11:04:19.315468848 +0200
+++ jaxb-ri-4.0.5-RI/jaxb-ri/codemodel/codemodel/src/main/java/com/sun/codemodel/writer/LicenseCodeWriter.java	2025-07-17 12:09:59.372158276 +0200
@@ -33,9 +33,17 @@
  */
 public class LicenseCodeWriter extends FilterCodeWriter {
 
+    private static final String getCurrentYear() {
+        Calendar c = Calendar.getInstance();
+        String sde = System.getenv("SOURCE_DATE_EPOCH");
+        if (sde != null) {
+            c.setTimeInMillis(1000 * Long.parseLong(sde));
+        }
+        return String.valueOf(c.get(Calendar.YEAR));
+    }
     private static final String COPYRIGHT_LINE_TEMPLATE = "^.*Copyright \\(c\\) (YYYY) (by )?([A-Za-z].*)$";
     private static final Pattern PATTERN = Pattern.compile(COPYRIGHT_LINE_TEMPLATE, Pattern.MULTILINE);
-    private static final String CURRENT_YEAR = String.valueOf(Calendar.getInstance().get(Calendar.YEAR));
+    private static final String CURRENT_YEAR = getCurrentYear();
 
     private final Path license;
 
--- jaxb-ri-4.0.5-RI/jaxb-ri/txw/compiler/src/main/java/com/sun/tools/txw2/TxwTask.java	2025-07-17 11:04:19.490955785 +0200
+++ jaxb-ri-4.0.5-RI/jaxb-ri/txw/compiler/src/main/java/com/sun/tools/txw2/TxwTask.java	2025-07-17 12:14:54.350779383 +0200
@@ -14,6 +14,7 @@
 import com.sun.codemodel.JPackage;
 import com.sun.codemodel.writer.FileCodeWriter;
 import com.sun.codemodel.writer.FilterCodeWriter;
+import com.sun.codemodel.writer.LicenseCodeWriter;
 import org.apache.tools.ant.BuildException;
 import org.apache.tools.ant.Project;
 import com.sun.tools.rngom.parse.compact.CompactParseable;
@@ -197,55 +198,4 @@
         Main.run(options);
         log( "Compilation complete.", Project.MSG_INFO );
     }
-
-    /**
-     * Writes all the source files under the specified file folder and inserts a
-     * license file each java source file.
-     */
-    private static final class LicenseCodeWriter extends FilterCodeWriter {
-
-        private static final String COPYRIGHT_LINE_TEMPLATE = "^.*Copyright \\(c\\) (YYYY) (by )?([A-Za-z].*)$";
-        private static final Pattern PATTERN = Pattern.compile(COPYRIGHT_LINE_TEMPLATE, Pattern.MULTILINE);
-        private static final String CURRENT_YEAR = String.valueOf(Calendar.getInstance().get(Calendar.YEAR));
-
-        private final Path license;
-
-        /**
-         * @param core     This CodeWriter will be used to actually create a storage
-         *                 for files. LicenseCodeWriter simply decorates this underlying
-         *                 CodeWriter by adding prolog comments.
-         * @param license  license File
-         * @param encoding encoding
-         */
-        LicenseCodeWriter(CodeWriter core, File license, String encoding) {
-            super(core);
-            this.license = license.toPath();
-            this.encoding = encoding;
-        }
-
-        @Override
-        public Writer openSource(JPackage pkg, String fileName) throws IOException {
-            Writer w = super.openSource(pkg, fileName);
-
-            PrintWriter out = new PrintWriter(w);
-            try (BufferedReader br = Files.newBufferedReader(license, Charset.forName(encoding))) {
-                String line;
-                while ((line = br.readLine()) != null) {
-                    Matcher m = PATTERN.matcher(line);
-                    if (m.matches()) {
-                        out.write(line, 0, m.start(1));
-                        out.write(CURRENT_YEAR);
-                        out.write(line, m.end(1), line.length() - m.end(1));
-                    } else {
-                        out.write(line);
-                    }
-                    out.write(System.lineSeparator());
-                }
-            }
-
-            out.flush();    // we can't close the stream for that would close the underlying stream.
-
-            return w;
-        }
-    }
 }
--- jaxb-ri-4.0.5-RI/jaxb-ri/xjc/src/main/java/com/sun/tools/xjc/Options.java	2025-07-17 11:04:19.500125417 +0200
+++ jaxb-ri-4.0.5-RI/jaxb-ri/xjc/src/main/java/com/sun/tools/xjc/Options.java	2025-07-17 13:42:13.962973199 +0200
@@ -962,9 +962,14 @@
                 + Messages.format(Messages.TIME_FORMAT);
         SimpleDateFormat dateFormat = new SimpleDateFormat(format, Locale.ENGLISH);
 
+        Date now = new Date();
+        String sde = System.getenv("SOURCE_DATE_EPOCH");
+        if (sde != null) {
+            now = new Date(1000 * Long.parseLong(sde));
+        }
         return Messages.format(
             Messages.FILE_PROLOG_COMMENT,
-            dateFormat.format(new Date()));
+            dateFormat.format(now));
     }
 
     /**