Currently, due dates can only be set for the main task dates, and custom fields in date type are limited to a single date option. It would greatly enhance usability if any added custom field in date type could include both a start date and a due date. This feature would be especially beneficial for users who rely on calendar views to manage their tasks effectively.

Implementing this change would provide more flexibility and support to project workflows, allowing us to better plan and track tasks with multiple deadlines, especially in calendar views.