74 hours.
72 hours
There are 60 hours in this time period.
Midnight to noon is 12 hours.
4pm to midnight is 8 hours.
There are 13 hours between 1 PM and midnight.
When it comes to the syndicated markets and worldwide airings, it's impossible to know however, as for FXX, as of April 2015, they're on from 8pm to midnight tonight, 6pm to midnight tomorrow, 11am to noon Saturday, 3pm to 7pm on Sunday, 6pm to midnight on Monday, 8pm to midnight Tuesday, they take Wednesday off & as the ad says... repeat.
21 hours
51 hours
From midnight (am) to Noon (pm) is 12 hours.
South Korea is 8 hours ahead of Britain. eg: When it's 4pm on Saturday 11th in Britain it would be 12am(midnight) on Sunday 12th in Korea.
There is no such time as 12 pm: there in 12 noon and 12 midnight. Due to the ambiguous use of 12 pm, the question cannot be answered.