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The first hour after midnight is called 1 a.m.
Killer Sisters' Midnight Hour - 2012 Atrocius 1-1 was released on:
USA: October 2012
If the time is between midnight and 1 AM, call the hour "00" instead of "12".
If the time is between 1 AM and 1 PM, both systems are exactly the same.
If the time is between 1 PM and midnight, add 12 to the hour.
Killer Sisters' Midnight Hour - 2012 Chop 1-3 was released on:
Killer Sisters' Midnight Hour - 2012 The Woman 1-2 was released on: