January 1, 2020
Update to Drupal 8.8.1 is available to apply as a 1-click update on Pantheon site dashboards.
Update to Drupal 7.69 is available to apply as a 1-click update on Pantheon site dashboards.
Special Note on Updating to Drupal 8.8.x
If you have a Drupal 8.7.x site based on the example-drops-8-composer upstream, or with a manually modified CONFIG_SYNC_DIRECTORY, manually update settings.php before upgrading to Drupal 8.8.x. For details, see Configuring Settings.php