I have begun work on a Drupal 8 version with the previously discussed plan of...

I have begun work on a Drupal 8 version with the previously discussed plan of using the date-converter. @mhmd, thanks for your initial work on the D8 repository. I will use some of the parts if you don't mind.

The 8.x version is not usable yet. I am pushing the branch so that it appears on Drupal packagist and I can continue working on this. I will create other issues to track each part of the work.