Greenwich Mean Time (GMT) or universal time (often suffixed "zulu") is used by aircraft globally.
UK is presently on GMT (in winter)
EST = GMT -5hrs,
CST = GMT -6hrs,
MST = GMT -7hrs, and
PST = GMT -8hrs.

New Zealand = GMT + 11hrs or
New Zealand = PST + 19hrs; i.e. it's nearly always tomorrow! [Linked Image]

This is a very hand time conversion page that keeps track of daylight saving in both the northern and southern hemispheres! Can otherwise get *very* confusing.

[This message has been edited by Hutch (edited 02-09-2004).]