Depending on how our website will be utilizing dates, whether for display within content, or for filtering content based on published dates or date fields, having proper Regional settings configured can make all the difference.

If we navigate to /admin/config/regional/settings, or use the Admin menu and click on Configuration | Regional settings, we can take a look at the values we can set:

Depending on the Drupal installation process, the Default country and Default time zone fields may or may not be filled in. In any case, it is important to ensure that both these fields are set as per the country and time zone the website will be using.