diff --git a/addons/web_calendar/static/src/js/web_calendar.js b/addons/web_calendar/static/src/js/web_calendar.js
index 4589a471283..63066f7a861 100644
--- a/addons/web_calendar/static/src/js/web_calendar.js
+++ b/addons/web_calendar/static/src/js/web_calendar.js
@@ -510,6 +510,9 @@ openerp.web_calendar = function(instance) {
                             throw new Error("Incomplete data received from dataset for record " + evt.id);
                         }
                     }
+                    else if (_.contains(["date", "datetime"], self.fields[fieldname].type)) {
+                        temp_ret[fieldname] = instance.web.format_value(value, self.fields[fieldname]);
+                    }
                     else {
                         temp_ret[fieldname] = value;
                     }