The date module for Drupal (https://www.drupal.org/project/date) is generally brilliant and I've used it a number of times in the past. In Drupal 8 it is part of core which is testament to how useful a module it is.
Church website which is designed specifically to allow parishioners to update the website themselves. Users can create group pages, events, event reviews and forum posts. Also allows the church newsletter to be built with the website, printed and emailed out. Fully responsive design built on Drupal 7.