diff --git a/libs/plugins/function.html_select_date.php b/libs/plugins/function.html_select_date.php
index 3b2fd01b..94ba9229 100644
--- a/libs/plugins/function.html_select_date.php
+++ b/libs/plugins/function.html_select_date.php
@@ -56,7 +56,7 @@ function smarty_function_html_select_date($params, &$smarty)
     extract($params);
 
 	// If $time is not in format yyyy-mm-dd
-	if (!preg_match('/\d{4}-\d{2}-\d{2}/', $time)) {
+	if (!preg_match('/^\d{4}-\d{2}-\d{2}$/', $time)) {
 		// then $time is empty or unix timestamp or mysql timestamp
 		// using smarty_make_timestamp to get an unix timestamp and
 		// strftime to make yyyy-mm-dd
diff --git a/plugins/function.html_select_date.php b/plugins/function.html_select_date.php
index 3b2fd01b..94ba9229 100644
--- a/plugins/function.html_select_date.php
+++ b/plugins/function.html_select_date.php
@@ -56,7 +56,7 @@ function smarty_function_html_select_date($params, &$smarty)
     extract($params);
 
 	// If $time is not in format yyyy-mm-dd
-	if (!preg_match('/\d{4}-\d{2}-\d{2}/', $time)) {
+	if (!preg_match('/^\d{4}-\d{2}-\d{2}$/', $time)) {
 		// then $time is empty or unix timestamp or mysql timestamp
 		// using smarty_make_timestamp to get an unix timestamp and
 		// strftime to make yyyy-mm-dd