D8 HTML tags from field converted to special characters when printing variables
It is unsafe to print raw data from a field value.

Instead of using {{ node.field_hours.value }} put this in your node template:

{{ content.field_hours }}


This will print out the field as configured in the view mode. In the view mode you can select a text filter that matches the allowed tags of the ckeditor. In Drupal 8 all necessary text formats are predefined to be used together with ckeditor.