For example, when I'm under Canadian Atlantic Standard Time (UTC-4), I don't really care that "S" is valued at "19". Since we're generally not very interested in solar times in Greenwich England, it's not actually necessary to consider the actual values for the single letter codes for the hours. In the system presented here, local midnight (and the negative offset from Z) for each zone is the same as the zone's letter designator. I thought using A-W to represent 01-23 was a bit more natural. Nautical time does something similar with the zones. His original proposal for universal time included letter-coded hours, but omitting "I" and "U". The idea for the conversion charts came from reading the book Time Lord (2000), by Clark Blaise, a biography of time zones pioneer of Sandford Fleming. So if he's using Zone Alfa he will have to add 30 minutes before he reports his Zulu time. Similarly, he could use Zone Alfa, but his own time is 30 minutes behind that. Therefore, he will have to subtract 30 minutes from his clock time before he reports his Zulu time. If Bob is reporting times in this zone, he can use Zone Charlie, but his own time is 30 minutes ahead of this. For example, Canadian Newfoundland Daylight Time is UTC-02:30. Some time zones have offsets from UTC that are not whole hours. Note on time zones with part hour offsets She could then use a short time stamp like 12/14 D10Z or 12/14 0410Z to report the "Zulu" time. Since on the chart she is after time "Z" and before her local midnight, she adds one day, making it December 14th.
#ZULU TIME CONVERTER APP CODE#
It's 8:10PM, so she examines the chart, finding that the 8 O'Clock spot on the PM (outer) ring reads "D", so her ammZ code for the present time is D10Z, or 04:10 UTC.
Alice sees that she's under US Pacific Standard Time, which is UTC-08:00, so she brings up the conversion chart for Zone Hotel. Suppose Alice is at the University of Washington at Seattle, WA, (where foldit is based) and it's December 13th. Note that for the purposes of table lookup UTC+13:00 is the same as UTC-11:00, UTC-14:00 is the same as UTC+10:00, and so on. If it's afternoon and the analog "little hand" is pointing as it would for 4PM and the little hand is pointing as it would for 35 minutes past the hour, the ammZ code would be P35Z, 16:35 UTC and so on.įolders in time zones with exact hour offsets from UTC can find their offset and load their proper conversion chart from the following table:Ĭonversion chart by time zone - UTC offset For example, if the hands show midnight, that's Z00Z, which is equivalent to 0000Z, 00:00 UTC, 12AM Z, 12AM Zulu and so on. Should you be looking at the hands of an analog clock set to Coordinated Universal Time (UTC), a four character "Zulu" time ammZ can be directly read from the chart.
, W) placed on an analog clock face with the AM letters in an inner ring, the PM letters in an outer ring. The Zone Zulu chart has the 24 single letter hour aliases (Z, A, B. The letters will sometimes be expanded to their equivalent Nato Phonetic Alphabet telephony codes: Zulu, Alfa, Bravo, Charlie. , 22, 23 we will use 24 letters as follows: Z, A, B, C. Besides the twenty-four hour clock hours 00, 01.
#ZULU TIME CONVERTER APP SERIES#
The charts are be based on Hour Aliases, a series of aliases (synonyms) for the twenty four hours 12AM, 1AM. 4 Note on time zones with part hour offsets.In military GMT is known as Zulu time.Greenwich Mean Time was the same as Universal Time (UT), until the introduction of UTC in 1972 a standard astronomical concept used in many technical fields. It is now often used to refer to Coordinated Universal Time (UTC) when this is viewed as a time zone, and in casual use for the most parts it is the same. Greenwich Mean Time (GMT) originally referred to the mean solar time at the Royal Observatory in Greenwich, London. Other major cities in the area are Abidjan, Dakar, Grand Dakar, Accra Principal Cities: The largest city in the GMT timezone is London from United Kingdom with population about 7.557 million people. Offset: GMT is 0 hours ahead Greenwich Mean Time (GMT) and is used in EuropeĬountries: It is used in following countries: Burkina Faso, Côte d'Ivoire, Britain (UK), Guernsey, Ghana, Greenland, Gambia, Guinea, Guinea-Bissau, Ireland, Isle of Man, Iceland, Jersey, Liberia, Mali, Mauritania, St Helena, Sierra Leone, Senegal, Sao Tome & Principe, Togo
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