fix date_format to actually work..

hyde/ext/templates/jinja.py

@@ -89,7 +89,7 @@ def urldecode(ctx, url):
 def date_format(ctx, dt, fmt=None):
     if not dt:
         dt = datetime.now()
-    if not isinstance(dt, datetime) or \
+    if not isinstance(dt, datetime) and \
             not isinstance(dt, date):
         logger.error("Date format called on a non date object")
         return dt