PM hours continue from 12:00 - 23:59
An easy way to calculate standard PM time to military time is to add 12:00 to the standard PM time. I.E. Military time for 2:45 PM would be calulated as 2:45 + 12:00 = 14:45
Here's a chart:
| Standard time to Military Time | |
|---|---|
| Standard Time | Military Time |
| 1:00 AM | 01:00 |
| 2:00 AM | 02:00 |
| 3:00 AM | 03:00 |
| 4:00 AM | 04:00 |
| 5:00 AM | 05:00 |
| 6:00 AM | 06:00 |
| 7:00 AM | 07:00 |
| 8:00 AM | 08:00 |
| 9:00 AM | 09:00 |
| 10:00 AM | 10:00 |
| 11:00 AM | 11:00 |
| 12:00 PM | 12:00 |
| 1:00 PM | 13:00 |
| 2:00 PM | 14:00 |
| 3:00 PM | 15:00 |
| 4:00 PM | 16:00 |
| 5:00 PM | 17:00 |
| 6:00 PM | 18:00 |
| 7:00 PM | 19:00 |
| 8:00 PM | 20:00 |
| 9:00 PM | 21:00 |
| 10:00 PM | 22:00 |
| 11:00 PM | 23:00 |
| Midnight | 00:00 |
Zulu time is that which you might know as UTC (Coordinated Universal Time), formerly GMT (Greenwich Mean Time). Our natural concept of time is linked to the rotation of the earth and we define the length of the day as the 24 hours it takes the earth to spin once on its axis.
As time pieces became more accurate and communication became global, there needed to be a point from which all other world times were based. Since Great Britain was the world's foremost martime power when the concept of latitude and longitude came to be, the starting point for designating longitude was the "prime meridian" which is zero degrees and runs through the Royal Greenwich Observatory, in Greenwich, England, just outside London.
Unfortunately the Earth does not rotate at exactly a constant rate. Due to various scientific reasons and increased accuracy in measuring the earth's rotation, a new timescale, called Coordinated Universal Time (UTC), has been adopted and replaces the term GMT. The Navy, as well as civil aviation, uses the letter "Z" (phonetically Zulu) to refer to the time at the prime meridian.
UTC to U.S Time Zone Calculations |
|
|---|---|
| U.S. Time Zone | Calculation FROM UTC TO U.S Time Zone |
| Atlantic Standard | Subtract Four hours |
| Atlantic Daylight | Subtract Three hours |
| Eastern Standard | Subtract Five hours |
| Eastern Daylight | Subtract Four hours |
| Central Standard | Subtract Six hours |
| Central Daylight | Subtract Five hours |
| Mountain Standard | Subtract Seven hours |
| Mountain Daylight | Subtract Six hours |
| Pacific Standard | Subtract Eight hours |
| Pacific Daylight | Subtract Seven hours |
| Alaskan Standard | Subtract Nine hours |
| Alaskan Daylight | Subtract Eight hours |
| Hawaiian Standard | Subtract Ten hours |
The U.S. time zones are:
Eastern ["R", "Romeo]
Central["S", "Sierra"]
Mountain ["T", "Tango"]
Pacific ["U", "Uniform"]
Alaska ["V", "Victor"]
Hawaii ["W", "Whiskey"].
Daylight Savings time runs in the U.S. (Except in Hawaii) from 2 a.m. on the first Sunday of April and time reverts to standard time at 2 a.m. on the last Sunday of October.
Along with Hawaii, American Samoa, Guam, Puerto Rico, the Virgin Islands, the Eastern Time Zone portion of the State of Indiana, and the state of Arizona (not the Navajo Indian Reservation, which does observe), do not observe the time change.
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