diff --git a/lib/Baser/View/Helper/BcFormHelper.php b/lib/Baser/View/Helper/BcFormHelper.php
index f26edcf2cd..fca7ff1b27 100644
--- a/lib/Baser/View/Helper/BcFormHelper.php
+++ b/lib/Baser/View/Helper/BcFormHelper.php
@@ -1349,7 +1349,7 @@ protected function _generateOptions($name, $options = [])
 				break;
 			case 'day':
 				for($i = 1; $i <= 31; $i++) {
-					$data[sprintf('%02d', $i)] = $i;
+					$data[sprintf('%02d', $i)] = sprintf('%02d', $i);
 				}
 				break;
 			case 'month':