Pre-Departure Trivia

Dear 4-T,

If I leave Columbia, South Carolina, U.S.A. on a flight at 9:00 a.m., stop in Tokyo Narita International Airport at 4:45 p.m. local time, and finally arrive at Taipei Taoyuan International Airport at 10:20 p.m. local time, how many hours have I spent traveling? How many time zones have I crossed through?

Questions to consider:

Did I give you enough information?
Did I give you too much information?
What information might you need to research before solving this problem?

Happy investigating!

Mr. G