![]() ![]() "Requirements for Internet Hosts - Application and Support". ^ "Standard for the format of ARPA network text messages".^ "Time Zones for Earhart Radio Message Database" (PDF).SG 037: Method of expressing date and time in military messages (Report). ^ Principal Staff Officers Committee ().To this day, if you look at certain maps that divide the world into time zones, the zones are assigned letters, "Sandford Fleming Sets the World's Clock". ^ Stromberg, Joseph (November 18, 2011)."Zulu and UTC: the story behind aviation's time zone". "Time for the Weather: Translating Zulu". ^ "Plans and Orders: Expressing Time", Army Planning and Orders Production, Field Manual 5-0 (FM 101-5) (PDF), Headquarters Department of the Army, United States Army, 20 January 200, p. G11, Express all times in a plan or order in terms of one time zone, for example ZULU (Z) or LOCAL (L).^ "ATP 6-02.70 Techniques for Spectrum Management Operations" (PDF).ACP 121(I), COMMUNICATION INSTRUCTIONS – GENERAL (PDF) (Report). ^ a b c d Combined Communications-Electronics Board (Oct 2010).It is recommended to ignore such designations and treat all such time designations as UTC unless out-of-band information is present. A=UTC-1 instead of A=UTC+1), and the use of military time zones in emails was deprecated in RFC 2822 in 2001. 1 am IST 2 am IST 3 am IST 4 am IST 5 am IST 6 am IST 7 am IST 8 am IST 9 am IST 10 am IST 11 am IST 12 pm IST 1 pm IST 2 pm IST 3 pm IST 4 pm IST 5 pm IST 6 pm IST 7 pm IST 8 pm IST 9 pm IST 10 pm IST 11 pm IST +6. RFC 1233 in 1989 noted that the signs of the offsets were specified as opposite the common convention (e.g. RFC 733 published in 1977 allowed using military time zones in the Date: field of emails. The British used a system of lettered zones, which was likely the direct influence. The note states "This method is based on the systems in use in the Armed Forces of these countries and the United States". The standard was first distributed by NATO as a note in 1950. Sandford Fleming devised a system assigning the letters A-Y excluding J to 1-hour time zones, which may have been the inspiration for the system. The ACP 121 standard actually refers to Greenwich Mean Time (GMT) as the base time standard, but UTC has superseded GMT as a more precise time standard, so the time offsets are commonly understood as UTC. The letter "Z" ("Zulu") indicates Coordinated Universal Time (UTC). The letter "N" is also used to designate zone -13 this is to provide for a ship in zone -12 keeping Daylight Saving Time. The letter "L" is also sometimes used to mean "Local" time, conflicting with its use for the Lima time zone. The letter "J" ("Juliet"), originally skipped, may be used to indicate the observer's local time. Therefore, adding 5 hours to 0600R produces the time in UTC, 1100Z. For example, the zone description for the Romeo time zone is +5. The numeric zone description or "plus and minus system" indicates the correction which must be applied to the time as expressed in order to convert to UTC. in zone UTC−5 is written "0600R" and spoken "zero six hundred Romeo". ![]() ![]() The letters are typically used in conjunction with military time. Going west from Greenwich, letters "November" to "Yankee" represent zones with negative offsets. Going east from the prime meridian at Greenwich, letters "Alfa" to "Mike" (skipping "J", see below) represent the 12 time zones with positive UTC offsets until reaching the international Date Line. As the ACP 121 standard, the military time zone system is used by the armed forces for Australia, Canada, New Zealand, the United Kingdom, the United States, and many nations in NATO. The military time zone system ensures clear communication in a concise manner, and avoids confusion when coordinating across time zones. The Zulu time zone (Z) is equivalent to Coordinated Universal Time (UTC) and is often referred to as the military time zone. » Click here for IST to Local Time Conversion.The military time zones are a standardized, uniform set of time zones for expressing time across different regions of the world, named after the NATO phonetic alphabet. » Click here for Auckland Time to Local Time Conversion. ![]()
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