Glossary
Travel & Geography
Time Zone
Definition
A region of the globe that observes a uniform standard time. The world is divided into 24 primary time zones, each offset from UTC by whole or half hours.
Related Terms
UTC/GMT/Zulu Time
Coordinated Universal Time (UTC), the primary time standard used in aviation worldwide. Also known as Greenwich Mean Time (GMT) or Zulu time (indicated by 'Z' suffix).
Jet Lag
A temporary sleep disorder caused by traveling across multiple time zones, disrupting the body's circadian rhythm. Symptoms include fatigue, insomnia, and difficulty concentrating.
International Date Line
An imaginary line running roughly along the 180th meridian in the Pacific Ocean where the calendar date changes. Traveling westward crosses to the next day; eastward to the previous day.