undefined function wp_date()

Hello,
I have seen that wp_date() was introduced in wp v5.3.0: https://developer.www.ads-software.com/reference/functions/wp_date/

In a wordpress v5.2.5 that I have, this error occurs:

Fatal error: Uncaught Error: Call to undefined function wp_date () in /opt/lampp/htdocs/test/wp-content/plugins/g-business-reviews-rating/index.php:1800