Welcome to the community, @Amina_El-Ashry! :grinning_face_with_big_eyes: I’m not able to replicate this behavior on my end. The date in the link is the same as the date in the primary field of the source table.
That aside, one way around this problem is to move the actual date to a secondary field, then turn the primary field into a formula that formats the date using
DATETIME_FORMAT(). That will create an exact match in the text of any links to these appointment records because the formatted date becomes text.