![]() The first is illustrated in the conversion chart. Two things make calculating Zulu time difficult. No “:” is used and the “PM/AM” suffix is replaced with a “Z”. Step 2: Use the Zulu conversion factorĮastern Standard time is five hours behind Zulu time (-5 on the chart) so we add five hours to our local 24-hour time. Anytime before 12 noon will just be the same number, so you can practically skip this step. ![]() Step 1: Convert local time to a 24-hour timeĢ:00 PM eastern standard time becomes 14:00. In this example, we’ll convert 2:00 PM Eastern Standard time into Zulu time. Here are some good general steps to calculate Zulu time from your local time. How Zulu time is converted to and from local time depends on where you live. H ow many military/action movies you’ve seen where they “synchronize watches”? As ships and airplanes began to cross multiple time zones in one journey it became more and more important to standardize time. For the military, it is extremely important when multiple countries are coordinating across different time zones that events occur at the exact same moment. Zulu time is most often used by the military, pilots, and by mariners. Zulu time’s first major usage was by the Royal Navy in the 19th century. For a while, when the “z” phonetic abbreviation was “zebra” this was called “Zebra time”. It simply comes from the shortening of “zero meridian time” to “z-time”, which is the military phonetic alphabet is “Zulu”. The name “Zulu” is not a special name either. Why Greenwich? Nothing other than it was where the first major center dedicated to navigation, astronomy, and timekeeping was built by King Charles II in 1675. It is based on the time in Greenwich, England. That means while it may be 4:00 PM in Atlanta but 3:00 PM in Fort Worth it is 2100Z in both time zones. It is a standard time, sometimes referred to as a geographically fixed time, across all time zones. Zulu time is the military name of Universal Time Coordinated (UTC) and Greenwich Mean Time (GMT). What Actually is “Zulu Time” and Why do Pilots Use it? This article will tell you what Zulu time is, how to calculate it and read it. It will become fairly easy to translate Zulu time into “normal” time. It is an important concept, but once you understand it. Zulu time is a foreign concept, especially for those without military experience. Before this moment millions of applications will need to either adopt a new convention for time stamps or be migrated to 64-bit systems which will buy the time stamp a "bit" more time.You’ve seen it on the weather charts and likely heard it on the ATIS, but you have no idea what it actually means. On this date the Unix Time Stamp will cease to work due to a 32-bit overflow. This is very useful to computer systems for tracking and sorting dated information in dynamic and distributed applications both online and client side. It should also be pointed out (thanks to the comments from visitors to this site) that this point in time technically does not change no matter where you are located on the globe. Therefore, the unix time stamp is merely the number of seconds between a particular date and the Unix Epoch. This count starts at the Unix Epoch on January 1st, 1970 at UTC. The unix time stamp is a way to track time as a running total of seconds.
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