What kind of clock do airlines use in their schedules?

What kind of clock do airlines use in their schedules?

• A. 24-Hour Clock
• B. 12-Hour Clock
• C. Local Time
• D. Greenwich Mean Time

Answer: (A)

Using the 24-hour clock in airline schedules keeps times unambiguous. Across flights that cross time zones and even the date boundary, a single representation like 13:45 clearly means one thing, while 1:45 could be mistaken for either morning or afternoon if a 12-hour format were used. This eliminates confusion for passengers, crew, and operations planning, especially when coordinating arrivals, departures, and connections. A 12-hour clock would require AM/PM and can be misread, local time varies by city making schedules harder to interpret consistently, and GMT is simply a reference time rather than a notation style—so it doesn’t address the readability issue on its own. The 24-hour format provides a stable, globally clear way to present times.

Using the 24-hour clock in airline schedules keeps times unambiguous. Across flights that cross time zones and even the date boundary, a single representation like 13:45 clearly means one thing, while 1:45 could be mistaken for either morning or afternoon if a 12-hour format were used. This eliminates confusion for passengers, crew, and operations planning, especially when coordinating arrivals, departures, and connections.

A 12-hour clock would require AM/PM and can be misread, local time varies by city making schedules harder to interpret consistently, and GMT is simply a reference time rather than a notation style—so it doesn’t address the readability issue on its own. The 24-hour format provides a stable, globally clear way to present times.