Fix non-reproducible archives

Copied from bazelbuild/rules_kotlin#304

private/tools/java/rules/jvm/external/jar/AddJarManifestEntry.java

@@ -9,11 +9,11 @@
 import java.nio.file.Files;
 import java.nio.file.Path;
 import java.nio.file.Paths;
-import java.time.LocalDateTime;
-import java.time.ZoneId;
 import java.util.ArrayList;
 import java.util.Arrays;
+import java.util.Calendar
 import java.util.Enumeration;
+import java.util.GregorianCalendar
 import java.util.List;
 import java.util.Objects;
 import java.util.jar.Attributes;
@@ -34,12 +34,24 @@
  # times of the jar entries.
  */
 public class AddJarManifestEntry {
-
-  public static final long DEFAULT_TIMESTAMP =
-      LocalDateTime.of(2010, 1, 1, 0, 0, 0)
-          .atZone(ZoneId.systemDefault())
-          .toInstant()
-          .toEpochMilli();
+
+  /**
+   * Note that setting the January 1st 1980 (or even worse, "0", as time) won't work due
+   * to Java 8 doing some interesting time processing: It checks if this date is before January 1st 1980
+   * and if it is it starts setting some extra fields in the zip. Java 7 does not do that - but in the
+   * zip not the milliseconds are saved but values for each of the date fields - but no time zone. And
+   * 1980 is the first year which can be saved.
+   * If you use January 1st 1980 then it is treated as a special flag in Java 8.
+   * Moreover, only even seconds can be stored in the zip file. Java 8 uses the upper half of
+   * some other long to store the remaining millis while Java 7 doesn't do that. So make sure
+   * that your seconds are even.
+   * Moreover, parsing happens via `new Date(millis)` in {@link java.util.zip.ZipUtils}#javaToDosTime() so we
+   * must use default timezone and locale.
+   *
+   * The date is 1980 February 1st CET.
+   */
+  public static final long DEFAULT_TIMESTAMP = (
+   new GregorianCalendar(1980, Calendar.FEBRUARY, 1, 0, 0, 0)).getTimeInMillis();
 
   public static void verboseLog(String logline) {
     // To make this work you need to add 'use_default_shell_env = True' to the