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2. 24-hour clock - Wikipedia

   en.wikipedia.org/wiki/24-hour_clock

   24-hour digital clock in Miaoli HSR station. A public 24-hour clock in Curitiba, Brazil, with the hour hand on the outside and the minute hand on the inside.. A time of day is written in the 24-hour notation in the form hh:mm (for example 01:23) or hh:mm:ss (for example, 01:23:45), where hh (00 to 23) is the number of full hours that have passed since midnight, mm (00 to 59) is the number of ...

3. Military time zone - Wikipedia

   en.wikipedia.org/wiki/Military_time_zone

   The military time zone system ensures clear communication in a concise manner, and avoids confusion when coordinating across time zones. The CCEB , representing the armed forces of Australia, Canada, New Zealand, the United Kingdom, and the United States, publishes the military time zone system as the ACP 121 standard. [ 1 ]

4. Date and time notation in the United States - Wikipedia

   en.wikipedia.org/wiki/Date_and_time_notation_in...

   The 24-hour clock is used in military, public safety, and scientific contexts in the United States. [4] 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).

5. Military Date Time Group - Wikipedia

   en.wikipedia.org/wiki/Date-time_group

   In communications messages, a date-time group (DTG) is a set of characters, usually in a prescribed format, used to express the year, the month, the day of the month, the hour of the day, the minute of the hour, and the time zone, if different from Coordinated Universal Time (UTC).

6. When does the time change? Here's when Daylight Saving Time ...

   www.aol.com/does-time-change-heres-daylight...

   In March, the clocks "spring forward" an hour, and in November, they "fall back." In 2024, we'll return to standard time on Nov. 3. The time change helps to maximize the amount of natural daylight.

7. Military designation of days and hours - Wikipedia

   en.wikipedia.org/wiki/Military_designation_of...

   The specific time at which deployment for an operation commences. (US) L-Day For "Landing Day", 1 April 1945, the day Operation Iceberg (the invasion of Okinawa) began. [5] M-Day The day on which mobilization commences or is due to commence. (NATO) N-Day The unnamed day an active duty unit is notified for deployment or redeployment. (US) O-Day

8. Why Americans shifted, scrapped minutes and changed time ...

   www.aol.com/why-americans-shifted-scrapped...

   Philadelphians changed their clocks by one minute and went from living on "New York time" to "Standard time," according to The New York Times.

9. Time synchronization in North America - Wikipedia

   en.wikipedia.org/wiki/Time_synchronization_in...

   In the United States, the United States Naval Observatory provides the standard of time, called UTC(USNO), for the United States military and the Global Positioning System, [1] while the National Institute of Standards and Technology provides the standard of time for civil purposes in the United States, called UTC(NIST).