Introduce a feature that recognizes date-prefixed subject lines and provides an option to prioritize or group these emails. Because the date is placed at the beginning of the subject in YYYY/MM/DD format, a simple Subject (A→Z) sort naturally orders the emails by due date.

The enhancement would allow users to:

Pin or prioritize these date-formatted emails at the top of the inbox or a selected folder.
Sort by Subject while preserving chronological order based on the due date embedded in the subject.
Quickly view upcoming bills and payment obligations without creating separate calendar events, tasks, or reminders.

Benefits

Simple and intuitive workflow using existing email functionality.
No manual tracking outside the inbox.
Easier visibility into upcoming payment deadlines.
Reduced likelihood of late payments.
Works consistently because the YYYY/MM/DD format sorts alphabetically in the same order as the calendar.

This would provide a lightweight bill-management capability for users who already organize payment-related emails using structured subject lines.