From which point is time measured in aviation?

In aviation, time is measured based on Coordinated Universal Time (UTC), which is derived from timekeeping at the prime meridian. The prime meridian, located at 0 degrees longitude, serves as the reference line from which time zones around the world are defined. This standardization is crucial for aviation operations, as it allows for consistent scheduling, communication, and coordination across different time zones.

Using the prime meridian as a reference helps pilots and air traffic controllers avoid confusion that could arise from varying local times. While the equator is significant for latitude and the International Date Line is important for understanding the transition of dates, neither serves as a point for measuring time in the context of aviation. The North Pole, while a noteworthy geographical point, also does not relate to the standardized timekeeping used in the aviation industry. Hence, the prime meridian stands as the correct reference for time measurement in aviation.