Index: dspace-oai/dspace-oai-api/src/main/java/org/dspace/app/oai/DSpaceOAICatalog.java
===================================================================
--- dspace-oai/dspace-oai-api/src/main/java/org/dspace/app/oai/DSpaceOAICatalog.java
+++ dspace-oai/dspace-oai-api/src/main/java/org/dspace/app/oai/DSpaceOAICatalog.java
@@ -442,6 +442,9 @@
                                 + ((metadataPrefix == null) ? "null"
                                         : metadataPrefix)));
 
+        if (from != null && from.startsWith("0001-01-01")) from = null;
+        if (until != null && until.startsWith("9999-12-31")) until = null;
+        
         Map m = doRecordHarvest(from, until, set, metadataPrefix, 0);
 
         // Null means bad metadata prefix was bad