The customer would like the ability to modify deadlines based on their nature:

Soft Deadlines: These are flexible and can be adjusted if necessary. The customer should be able to extend or shift these deadlines to accommodate ongoing work.

Hard Deadlines: These are critical and require strict adherence. The customer needs clear visibility into these deadlines, with reminders and alerts to ensure timely submission.

This functionality will help the customer manage their workload more efficiently, allowing for better prioritization and planning.