Wrap your htm in a for with method GET
<form method="GET" action="your/url">
<a href="https://stackoverflow.com/questions/40883010/actionMAppointment.php?stu_id=<?php echo $row_RecEdit["stu_id'] ?>">Make Appointment (Test) </a>
Time:
<input type = "time" id = "appointmentTime"/>
Date:
<input type = "date" id = "appointmentDate"/>
<input type="submit" value="submit" />
</form>
solved Php How to pass date and time to another .php file [closed]