Danny
--- orig/jdk-6fa770f9f8ab/make/jdk/src/classes/build/tools/generatecharacter/GenerateCharacter.java	2022-04-13 19:24:10.211683257 +0200
+++ jdk-6fa770f9f8ab/make/jdk/src/classes/build/tools/generatecharacter/GenerateCharacter.java	2022-04-13 22:51:50.680487330 +0200
@@ -693,7 +693,7 @@
         PrintWriter out = new PrintWriter(new BufferedWriter(new FileWriter(theOutputFileName)));
         out.println(commentStart +
             " This file was generated AUTOMATICALLY from a template file " +
-            new java.util.Date() + commentEnd);
+            (System.getenv("SOURCE_DATE_EPOCH") == null ? new java.util.Date() : new java.util.Date(1000 * Long.parseLong(System.getenv("SOURCE_DATE_EPOCH")))) + commentEnd);
         int marklen = commandMarker.length();
         LOOP: while(true) {
             try {