diff --git a/CHANGELOG b/CHANGELOG
index a3b48802c4..21d5be1b15 100644
--- a/CHANGELOG
+++ b/CHANGELOG
@@ -1,3 +1,4 @@
+* Allow to specify datetime related values in XML files
 * Add environment variables to wsgi script
 * Add unique ids check on RPC
 * Assert unique records on ModelView.button and Workflow.transition
diff --git a/trytond/convert.py b/trytond/convert.py
index 9d50bb879c..315e18acea 100644
--- a/trytond/convert.py
+++ b/trytond/convert.py
@@ -1,6 +1,7 @@
 # This file is part of Tryton.  The COPYRIGHT file at the top level of
 # this repository contains the full copyright notices and license terms.
 import time
+import datetime
 from xml import sax
 import logging
 import re
@@ -230,6 +231,7 @@ class RecordTagHandler:
                 context['version'] = __version__.rsplit('.', 1)[0]
                 context['ref'] = self.mh.get_id
                 context['Decimal'] = Decimal
+                context['datetime'] = datetime
                 if pyson_attr:
                     context.update(CONTEXT)
                 value = eval(eval_attr, context)