What is UTC?

What is UTC?

• A. The local time at the departure airport
• B. The standard time used globally reflecting solar time along the prime meridian
• C. The time used only for international flights
• D. The time at the equator

Answer: (B)

UTC is the global time standard used everywhere to coordinate clocks and schedules. It’s based on precise atomic time and kept in sync with Earth's rotation by adding leap seconds, so it effectively aligns with mean solar time at the prime meridian (0° longitude). Because of that, the same time is used worldwide, regardless of location or daylight saving. This isn’t the local time of a specific airport, nor is it something limited to international flights. It isn’t tied to the equator or any single place—it's a universal reference point that lets flights and systems communicate consistently across time zones.

UTC is the global time standard used everywhere to coordinate clocks and schedules. It’s based on precise atomic time and kept in sync with Earth's rotation by adding leap seconds, so it effectively aligns with mean solar time at the prime meridian (0° longitude). Because of that, the same time is used worldwide, regardless of location or daylight saving.

This isn’t the local time of a specific airport, nor is it something limited to international flights. It isn’t tied to the equator or any single place—it's a universal reference point that lets flights and systems communicate consistently across time zones.