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

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

    Hours between 1 and 10 have their leading zero spoken as "oh", as in "oh eight thirty" to mean 8:30 a.m., although 00:30 would be "zero thirty". The Army adds the word "hours" after the military time (e.g. "eighteen hundred hours"), including for times not on the hour mark (e.g. "sixteen thirty hours"); however, the Navy and Marine Corps do not ...

  3. List of UTC offsets - Wikipedia

    en.wikipedia.org/wiki/List_of_UTC_offsets

    This is a list of the UTC time offsets, showing the difference in hours and minutes from Coordinated Universal Time (UTC), from the westernmost (−12:00) to the easternmost (+14:00).

  4. 24-hour clock - Wikipedia

    en.wikipedia.org/wiki/24-hour_clock

    The modern 24-hour clock is the convention of timekeeping in which the day runs from midnight to midnight and is divided into 24 hours. This is indicated by the hours (and minutes) passed since midnight, from 00(:00) to 23(:59), with 24(:00) as an option to indicate the end of the day.

  5. List of time zone abbreviations - Wikipedia

    en.wikipedia.org/wiki/List_of_time_zone...

    Such designations can be ambiguous; for example, "CST" can mean China Standard Time (UTC+08:00), Cuba Standard Time (UTC−05:00), and (North American) Central Standard Time (UTC−06:00), and it is also a widely used variant of ACST (Australian Central Standard Time, UTC+9:30). Such designations predate both ISO 8601 and the internet era; in ...

  6. UTC+14:00 - Wikipedia

    en.wikipedia.org/wiki/UTC+14:00

    UTC+14:00 is an identifier for a time offset from UTC of +14:00. This is the earliest time zone on Earth, meaning that areas in this zone are the first to see a new day, and therefore the first to celebrate a New Year. It is also referred to as the "latest time zone" on Earth, as clocks in it always show the 'latest' (i.e., most advanced) time ...

  7. Unit of time - Wikipedia

    en.wikipedia.org/wiki/Unit_of_time

    Note: The parsec is not a unit of time, but a unit of length of about 30.9 trillion kilometres, despite movie references otherwise. ... 14.4 minutes, or 864 seconds.

  8. ISO 8601 - Wikipedia

    en.wikipedia.org/wiki/ISO_8601

    Z is the zone designator for the zero UTC offset. "09:30 UTC" is therefore represented as "09:30Z" or "T0930Z". "14:45:15 UTC" would be "14:45:15Z" or "T144515Z". The Z suffix in the ISO 8601 time representation is sometimes referred to as "Zulu time" or "Zulu meridian" because the same letter is used to designate the Zulu time zone . [ 30 ]

  9. 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 ]