diff --git a/core/templates/layout.guest.php b/core/templates/layout.guest.php
index 6f59e18a8e1bc9509435dd45fa47d08911fe6b2d..1f39148b2b194475cc0d39067d4f6f86e79f0fa3 100644
--- a/core/templates/layout.guest.php
+++ b/core/templates/layout.guest.php
@@ -12,6 +12,9 @@
 			var oc_appswebroots = <?php echo $_['apps_paths'] ?>;
 			var oc_requesttoken = '<?php echo $_['requesttoken']; ?>';
 			var oc_requestlifespan = '<?php echo $_['requestlifespan']; ?>';
+			var dayNames = <?php echo json_encode(array((string)$l->t('Sunday'), (string)$l->t('Monday'), (string)$l->t('Tuesday'), (string)$l->t('Wednesday'), (string)$l->t('Thursday'), (string)$l->t('Friday'), (string)$l->t('Saturday'))) ?>;
+			var monthNames = <?php echo json_encode(array((string)$l->t('January'), (string)$l->t('February'), (string)$l->t('March'), (string)$l->t('April'), (string)$l->t('May'), (string)$l->t('June'), (string)$l->t('July'), (string)$l->t('August'), (string)$l->t('September'), (string)$l->t('October'), (string)$l->t('November'), (string)$l->t('December'))) ?>;
+			var firstDay = <?php echo json_encode($l->l('firstday')) ?>;
 		</script>
 		<?php foreach($_['jsfiles'] as $jsfile): ?>
 			<script type="text/javascript" src="<?php echo $jsfile; ?>"></script>