In a world without politics, time zones would change by an hour for a shift of 15 degrees of longitude. But, of course, political considerations apply, explains Devangshu Datta.
The airline re-built the flight schedule and refunded passengers.
Under fire over its slow reaction over three British schoolgirls who reportedly fled to Syria to join the Islamic State, Scotland Yard on Tuesday defended its actions, saying it began a probe as soon as facts were established.