Zulu Time (UTC)

The universal time standard used in aviation, also known as Coordinated Universal Time (UTC) or Greenwich Mean Time (GMT). All METARs, TAFs, NOTAMs, flight plans, and ATC clearances use Zulu time to avoid confusion across time zones. It is expressed using a 24-hour clock followed by the letter "Z". For example, 1500Z means 3:00 PM UTC. Pilots must be able to convert between local time and Zulu time for planning and communication.