diff --git a/core/templates/layout.guest.php b/core/templates/layout.guest.php
index 1f39148b2b1..9434948a9e8 100644
--- a/core/templates/layout.guest.php
+++ b/core/templates/layout.guest.php
@@ -14,7 +14,7 @@
 			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($l->l('firstday')) ?>;
+			var firstDay = <?php echo json_encode($l->t('firstday')) ?>;
 		</script>
 		<?php foreach($_['jsfiles'] as $jsfile): ?>
 			<script type="text/javascript" src="<?php echo $jsfile; ?>"></script>
diff --git a/core/templates/layout.user.php b/core/templates/layout.user.php
index 1f16fdf7c6c..009ee592738 100644
--- a/core/templates/layout.user.php
+++ b/core/templates/layout.user.php
@@ -16,7 +16,7 @@
 			var datepickerFormatDate = <?php echo json_encode($l->l('jsdate')) ?>;
 			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')) ?>;
+			var firstDay = <?php echo json_encode($l->t('firstday')) ?>;
 		</script>
 		<?php foreach($_['jsfiles'] as $jsfile): ?>
 			<script type="text/javascript" src="<?php echo $jsfile; ?>"></script>