There's a few of them: 0200,0300,0500,0700,1100,1700,1900, and 2300. Of course, if you include minutes, please see the list here: http://www.wolframalpha.com/input/?i=list+of+primes+to+2400
Edit: apologies, didn't read the "PM" after one. Of course 1300 is a prime of the same pattern, however unlucky it may be.