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  2. Eastern Time Zone - Wikipedia

    en.wikipedia.org/wiki/Eastern_Time_Zone

    Since then, local times change at 2:00 a.m. EST to 3:00 a.m. EDT on the second Sunday in March, and return from 2:00 a.m. EDT to 1:00 a.m. EST on the first Sunday in November. [4] In Canada, daylight saving time begins and ends on the same days and at the same times as it does in the United States. [5] [6]

  3. Binary clock - Wikipedia

    en.wikipedia.org/wiki/Binary_clock

    Time Technology's Samui Moon binary-coded sexagesimal wristwatch. This clock reads 3:25. Binary clocks that display time in binary-coded sexagesimal also exist. Instead of representing each digit of traditional sexagesimal time with one binary number, each component of traditional sexagesimal time is represented with one binary number, that is, using up to 6 bits instead of only 4.

  4. National Research Council Time Signal - Wikipedia

    en.wikipedia.org/wiki/National_Research_Council...

    " CNRC, Heure (Normale/Avancée) de l'Est, h heures, m minutes, et s secondes. " This is followed by a single 800 Hz beep lasting 0.3 seconds. The word "exactly" (in French, précises) replaces "and s seconds"/" et s seconds" at the top of the minute. Additionally, there is an 800 Hz "tick" every second in the background.

  5. Leap second - Wikipedia

    en.wikipedia.org/wiki/Leap_second

    Screenshot of the UTC clock from time.gov during the leap second on 31 December 2016.. A leap second is a one-second adjustment that is occasionally applied to Coordinated Universal Time (UTC), to accommodate the difference between precise time (International Atomic Time (TAI), as measured by atomic clocks) and imprecise observed solar time (), which varies due to irregularities and long-term ...

  6. Swatch Internet Time - Wikipedia

    en.wikipedia.org/wiki/Swatch_Internet_Time

    Swatch Internet Time (or .beat time) is a decimal time system introduced in 1998 by the Swatch corporation as part of the marketing campaign for their line of ".beat" watches. Those without a watch could use the Internet to view the current time on the watchmaker's website, but now a dedicated wiki serves the purpose. [ 1 ]

  7. Time in the United States - Wikipedia

    en.wikipedia.org/wiki/Time_in_the_United_States

    (See map inset right.) In 2005, Indiana passed legislation that took effect on April 2, 2006, that placed the entire state on daylight saving time (see Time in Indiana). Before then, Indiana officially used standard time year-round, with the following exceptions: The portions of Indiana that were on Central Time observed daylight saving time.

  8. Decimal time - Wikipedia

    en.wikipedia.org/wiki/Decimal_time

    Times between midnight and the first decimal hour were written without hours, so 1:00 am, or 0.41 decimal hours, was written as "four décimes" or "forty-one minutes". 2:00 am (0.8333) was written as "eight décimes", "eighty-three minutes", or even "eighty-three minutes thirty-three seconds". As with duodecimal time, decimal time was ...

  9. Metric time - Wikipedia

    en.wikipedia.org/wiki/Metric_time

    Metric time is the measure of time intervals using the metric system. The modern SI system defines the second as the base unit of time, and forms multiples and submultiples with metric prefixes such as kiloseconds and milliseconds. Other units of time – minute, hour, and day – are accepted for use with SI, but are not part of it