diff --git a/fields/date.py b/fields/date.py
index 2ca9469..522e2ab 100644
--- a/fields/date.py
+++ b/fields/date.py
@@ -33,9 +33,11 @@ def getDateFromIndexValue(indexValue):
     indexValue = (indexValue-hours) / 24 # The remaining part, in days
     # Get days
     day = indexValue % 31
+    if day == 0: day = 31
     indexValue = (indexValue-day) / 31 # The remaining part, in months
     # Get months
     month = indexValue % 12
+    if month == 0: month = 12
     year = (indexValue - month) / 12
     from DateTime import DateTime
     utcDate = DateTime('%d/%d/%d %d:%d UTC' % (year,month,day,hours,minutes))
diff --git a/fields/workflow.py b/fields/workflow.py
index 82f52f5..66e4c6e 100644
--- a/fields/workflow.py
+++ b/fields/workflow.py
@@ -153,12 +153,12 @@ class State:
         if isinstance(permissions, basestring): permissions = (permissions,)
         for perm, roles in self.permissions.iteritems():
             if permissions and (perm not in permissions): continue
-            # Find and delete p_oldRoleName.
+            # Find and delete p_oldRoleName
             for role in roles:
                 if role.name == oldRoleName:
-                    # Remove p_oldRoleName.
+                    # Remove p_oldRoleName
                     roles.remove(role)
-                    # Add p_newRoleName.
+                    # Add p_newRoleName
                     roles.append(self.getRole(newRoleName))
                     break