Custom calendar entry label text

[foxyshadis]

I'd like to change calendar entries to both shortened time formats (like 10A instead of 10:00 AM) and including the location and status on the subject line. I'd also like to get rid of the stupid reminder bell/envelope icon. Obviously, there's no built-in way to change this, so I ask you, the kind experts, if there's any kind of extension that can modify the default text of appointment labels.

[tanstaafl]

Moved from the Thunderbird Support forum to the Calendar forum as that is where the Lightning experts are.