diff --git a/src/gen/lib/date.py b/src/gen/lib/date.py
index 8a2b46ace..c83e3298c 100644
--- a/src/gen/lib/date.py
+++ b/src/gen/lib/date.py
@@ -1647,9 +1647,10 @@ class Date(object):
                             raise DateError("Invalid year {0} passed in value {1}".
                                     format(original, value))
 
-                except DateError:
+                except DateError as e:
                     log.debug("Sanity check failed - self: {0}, sanity: {1}".format(
                         self.dateval, sanity.dateval))
+                    e.date = self
                     raise
 
     def recalc_sort_value(self):