How time zones work, the International Date Line, and the UTC offset for major world cities.
36 cards · basic cards · AI-written, checked twice. Edit anything.
- What is a time zone?
- A region where everyone uses the same standard time.
- What does UTC stand for?
- Coordinated Universal Time.
- What is the Prime Meridian?
- The line of 0 degrees longitude passing through Greenwich, London.
- How many standard time zones exist globally?
- 24, one for each hour of the day.
- What is the International Date Line?
- An imaginary line at approximately 180 degrees longitude where the calendar date changes.
- When traveling west across the International Date Line, the date does what?
- Advances one day forward.
- When traveling east across the International Date Line, the date does what?
- Goes back one day.
- What is GMT?
- Greenwich Mean Time, equivalent to UTC.
- If it is noon UTC, what time is it in UTC+3?
- 3:00 PM.
- If it is noon UTC, what time is it in UTC-5?
- 7:00 AM.
- If it is noon UTC, what time is it in UTC+8?
- 8:00 PM.
- If it is 6:00 PM UTC, what time is it in UTC+9?
- 3:00 AM the next day.
- How many hours ahead is UTC+12 compared to UTC+0?
- 12 hours.
- How many hours behind is UTC-8 compared to UTC+0?
- 8 hours.
- How many hours apart are UTC+5 and UTC-3?
- 8 hours.