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Time zone name Degrees longitude Designation letter Zone description Offset Alfa Time Zone 7.5 E to 22.5 E A: −1 UTC+01:00: Bravo Time Zone 22.5 E to 37.5 E B: −2 UTC+02:00: Charlie Time Zone 37.5 E to 52.5 E C: −3 UTC+03:00: Delta Time Zone 52.5 E to 67.5 E D: −4 UTC+04:00: Echo Time Zone 67.5 E to 82.5 E E: −5 UTC+05:00: Foxtrot ...
Military time zones are lettered and given word designations from the NATO phonetic alphabet. For example, in US Eastern Standard Time (UTC−5), which is designated time zone R, 2:00 a.m. is written "0200R" and spoken "zero two hundred Romeo". Local time is designated as zone J or "Juliett". "1200J" ("twelve hundred Juliett") is noon local time.
H-Hour. The specific time at which an operation or exercise commences, or is due to commence (this term is used also as a reference for the designation of days/hours before or after the event). (NATO); also known as 'Zero Hour'. I-Day. Used informally within the U.S. military bureaucracy to variously designate the "Implementation Day" or the ...
In US military messages and communications (e.g., on maps showing troop movements) the format is DD HHMM (SS) Z MON YY. Although occasionally seen with spaces, it can also be written as a single string of characters. Three different formats can be found: DDHHMMSSZmmmYY - Full time (used for software timestamps)
United States customary units. United States customary units (often incorrectly referred to as imperial units) [1] form a system of measurement units commonly used in the United States and most U.S. territories, [2] since being standardized and adopted in 1832. [3] The United States customary system developed from English units that were in use ...
The 24-hour clock is used in military, public safety, and scientific contexts in the United States. It is best known for its use by the military and is therefore commonly called "military time". In U.S. military use, 24-hour time is traditionally written without a colon (1800 instead of 18:00).
Coordinated Universal Time ( UTC) is the primary time standard globally used to regulate clocks and time. It establishes a reference for the current time, forming the basis for civil time and time zones. UTC facilitates international communication, navigation, scientific research, and commerce. UTC has been widely embraced by most countries and ...
One décime is equal to 10 decimal minutes, which is nearly equal to a quarter-hour (15 minutes) in standard time. Thus, "five hours two décimes" equals 5.2 decimal hours, roughly 12:30 p.m. in standard time. [8] [9] One hundredth of a decimal second was a decimal tierce.
The current time is at top right in orange. Both the 12-hour and 24-hour notations are commonly used in Japan. The 24-hour notation is commonly used in Japan, especially in train schedules. The 12-hour notation is also commonly used, by adding 午前 ("before noon") or 午後 ("after noon") before the time, e.g. 午前10時 for 10 am.
Nautical time. Nautical time is a maritime time standard established in the 1920s to allow ships on high seas to coordinate their local time with other ships, consistent with a long nautical tradition of accurate celestial navigation. Nautical time divides the globe into 24 nautical time zones with hourly clock offsets, spaced at 15 degrees by ...