diff --git a/core/modules/views/src/Plugin/views/query/Sql.php b/core/modules/views/src/Plugin/views/query/Sql.php
index 72cc5f9..e308c1a 100644
--- a/core/modules/views/src/Plugin/views/query/Sql.php
+++ b/core/modules/views/src/Plugin/views/query/Sql.php
@@ -1755,7 +1755,7 @@ public function getDateFormat($field, $format) {
           'l' => 'Day',
           // No format for Day of the month without leading zeros.
           'j' => 'DD',
-          'W' => 'WW',
+          'W' => 'IW',
           'H' => 'HH24',
           'h' => 'HH12',
           'i' => 'MI',