Oxford time
A bizarre concept of time particular to students of Oxford University in which all things begin five minutes after and end five minutes before they are scheduled to. At Oxford, 10 minutes of every hour vanish into a bizarre time warp making Oxford students completely incompatible with normal people and their less sophisticated 60 minute hours.
Normal person: I see your class runs from 10-11.
Oxford student: Yes, but in Oxford time that is 10:05-10:55.
Normal person: You're insane.
Oxford student: Yes, but in Oxford time that is 10:05-10:55.
Normal person: You're insane.