Magento 2.4.4 with php 8.1 issue

I have version 8.1.3 of PHP and I am getting the following error message on Magento 2.4.4:

    Exception #0 (Exception): Deprecated Functionality: strtotime(): Passing null to parameter #1 ($datetime) 
of type string is deprecated in /data/web/magento2/lib/internal/Magento/Framework/Stdlib/DateTime/Timezone.php on line 259

on the homepage, category pages etc. Have you faced this issue before ? Do you have any suggestions how to fix it ?

Thank you