WordPress 5.3 “Kirk” was released to the public on November 12, 2019.
Block Editor Improvements, Expanded Design Flexibility, Introducing Twenty Twenty, Improvements for Everyone.
PHP 7.4 Compatibility:
WordPress 5.3 aims to fully support PHP 7.4. This release contains multiple changes to remove deprecated functionality and ensure compatibility. WordPress continues to encourage all users to run the latest and greatest versions of PHP.