At 07:56 PM 7/29/2005, Brian Kirby wrote... >GMT = UTC. A lot of old school folks in the Military and NASA were schooled as GMT or ZULU time for UTC. GMT is actually ambiguous, and in actual use can refer to either UTC or UT1. It predates UTC, and was used prior to the introduction of UTC. Here's an interesting article: http://www.apparent-wind.com/gmt-explained.html