how to update "due date" field format while using it in Routines

Summary:

Hi Team,
We have created a Routines for ACTIVITIES and using "DUE DATE" field on the SUBJECT of email.
When email is triggered, with date, Time is also seen on the Subject.
Please suggest how we can change the format at the routines side specifically without impacting other UI, objects and pages.

Outcome -
Task "Prepare Virginia campus solution brief" is due on 2026-06-16T00:00:00

Expected Outcome -
Task "Prepare Virginia campus solution brief" is due on 2026-06-16

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