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  2. Traditional Chinese timekeeping - Wikipedia

    en.wikipedia.org/wiki/Traditional_Chinese...

    The time between each gēng is 1 ⁄ 10 of a day, making a gēng 2.4 hours—or 2 hours 24 minuteslong. The 5 gēngs in the night are numbered from one to five: yì gēng ( 一 更 ) (alternately chū gēng ( 初更 ) for "initial watch"); èr gēng ( 二更 ); sān gēng ( 三更 ); sì gēng ( 四更 ); and wǔ gēng ( 五更 ).

  3. Repeater (horology) - Wikipedia

    en.wikipedia.org/wiki/Repeater_(horology)

    It strikes hours and then quarter hours, like the quarter repeater, then it uses a single tone in order to signal if more than half of the current quarter hour has passed. For example, if the time is 3:41 the mechanism will strike 3 low tones ("dong") to represent 3 hours, then 2 sequence tones ("ding-dong") to represent 2 quarter hours, then ...

  4. 12-hour clock - Wikipedia

    en.wikipedia.org/wiki/12-hour_clock

    Minutes past the hour means those minutes are added to the hour; "ten past five" means 5:10. Minutes to, 'til and of the hour mean those minutes are subtracted; "ten of five", "ten 'til five", and "ten to five" all mean 4:50. Fifteen minutes is often called a quarter hour, and thirty minutes is often known as a half hour. For example, 5:15 can ...

  5. Decimal time - Wikipedia

    en.wikipedia.org/wiki/Decimal_time

    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. [10]

  6. Unit of time - Wikipedia

    en.wikipedia.org/wiki/Unit_of_time

    10 3 s: About 17 minutes. hour: 60 min: deciday 0.1 d (10 % of a day) 2.4 hours, or 144 minutes. One-tenth of a day is 1 dd (deciday), also called "gēng" in traditional Chinese timekeeping. day: 24 h: Longest unit used on stopwatches and countdowns. The SI day is exactly 86 400 seconds. week: 7 d: Historically sometimes also called "sennight ...

  7. Academic quarter (class timing) - Wikipedia

    en.wikipedia.org/wiki/Academic_quarter_(class...

    Academic quarter only applies to time given in full hours, and the academic quarter can be removed by saying that the time is "on the dot" by adding the word "dot" ("prick" in Swedish) or an actual ".". E.g. 10 dot is 10:00. The dot removes one academic quarter, so in the evening time "on the dot" is written "dot dot" to remove both quarters ...

  8. Date and time representation by country - Wikipedia

    en.wikipedia.org/wiki/Date_and_time...

    Whether the 24-hour clock, 12-hour clock, or 6-hour clock is used. Whether the minutes (or fraction of an hour) after the previous hour or until the following hour is used in spoken language. The punctuation used to separate elements in all-numeric dates and times. Which days are considered the weekend.

  9. Clock face - Wikipedia

    en.wikipedia.org/wiki/Clock_face

    This had 10 decimal hours in the day, 100 decimal minutes per hour, and 100 decimal seconds per minute. Therefore, the decimal hour was more than twice as long (144 min) as the present hour, the decimal minute was slightly longer than the present minute (86.4 seconds) and the decimal second was slightly shorter (0.864 sec) than the present second.