commit 325502534ab33a72314ac6dd28421e1ae4e14e95
Author: Alice Kærast <alice.kaerast@webanywhere.co.uk>
Date:   Mon Apr 2 20:44:05 2012 +0100

    #500 validation fails because form->startdate isn't populated

diff --git a/calendar/event.php b/calendar/event.php
index bd8c630..e602b50 100644
--- a/calendar/event.php
+++ b/calendar/event.php
@@ -592,6 +592,7 @@ function validate_form(&$form, &$err) {
     $form->action = clean_param($form->action, PARAM_ALPHA);
     $form->type = clean_param($form->type, PARAM_ALPHA);
     $form->course = clean_param($form->course, PARAM_INT);
+    $form->timestart = make_timestamp($form->startyr, $form->startmon, $form->startday, $form->starthr, $form->startmin);
 
     if(empty($form->name)) {
         $err['name'] = get_string('errornoeventname', 'calendar');