Change record status: 
Project: 
Introduced in branch: 
8.5.x
Introduced in version: 
8.5.0
Description: 

The datetime_date_default_time() has been deprecated.

The ::setDefaultDateTime() method on \Drupal\Component\Datetime\DateTimePlus and inherited by \Drupal\Core\Datetime\DrupalDateTime should be used instead.

Impacts: 
Module developers