PM
From Tardis Wiki, the free Doctor Who reference
PM was a period of the day opposite to AM. (TV: The Sontaran Stratagem) 11:57 PM (23:57) was three minutes to midnight. (TV: The Pyramid at the End of the World)
The newly-regenerated Tenth Doctor planned to take Rose Tyler to the planet Barcelona on 6 PM of a Tuesday in October 5006, his previous incarnation having told her that she would've "love[d] it" immediately prior to his regeneration. However, he cancelled this to take her back home to the Powell Estate on Christmas Eve 2006. (TV: Children in Need Special)