Take a look at the PHP date function: http://php.net/manual/en/function.date.php
Then you can call tribe_get_start_date and tribe_get_end_date using custom formats. To produce the format you listed (12 hour times with lowercase am/pm), you could use the PHP date syntax ‘g:i a’ — for example: –
Dangit, I thought wrapping it in [code][/code] tags would work. Here, replace the [ ]s with s. [?php echo tribe_get_start_date( null, false, 'g:i a' ); ?] – [?php echo tribe_get_end_date( null, false, 'g:i a' ); ?]