Similar to USNOMC

GMAT - Greenwich Mean Astronomical Time UT - 12 hours
GMT - Greenwich Mean Time replaced by Universal Time in 1928, and UTC in 1960
GST - Greenwich Sidereal Time
GST - Guam Standard Time [UTC + 1000]
HAST - Hawaii-Aleutian Standard Time
HNA - Heure Normale de l'Atlantique Atlantic Standard Time
HOT - Hawaiian Ocean Time [UTC - 1100]

View all in Time Zones