12-hour time format
Select slot's custom format then copy/paste one of patterns from the table at the end of this page
Find the time code HH:mm
Replace with this hh:mm a
Save the add-on and test a submission
That's all
${"Start EEEEEEEE, MMM d"} - ${"Event title"}
${"Start MM/d',' HH:mm"} - ${"End HH:mm"}
${"Event title"} | ${"Start d/M/yyyy',' HH:mm"} - ${"End HH:mm"}
${"Event title"} | ${"Start MMM d, yyyy HH:mm a"} - ${"End HH:mm z"}
${"Start MMM d, yyyy hh:mm a"}
${"Start d/MM/yyyy"} | ${"Start hh:mm aa"} - ${"End hh:mm aa"}
${"Start dd/MM/yyyy" 'de' HH:mm"} à ${"End HH:mm"}
${"Start dd/MM/yyyy"} de ${"Start HH:mm"} à ${"End HH:mm"}