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In speech, a time given in 24-hour format is always followed by the word horas: el concierto comenzará a las 15:30 "quince y treinta" horas ("the concert will start at 15:30"). Fractional seconds are given in decimal notation, with punctuation marks used to separate the units of time (full stop, comma or single quotation marks). For elapsed ...
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 full minutes that have passed since the last full hour, and ss (00 to 59) is the number of seconds since the ...
It is also common to use this format in Portuguese, specifically in the northern part of Portugal. In France and Vietnam, the common separator between hours and minutes is the letter "h" (18h45, for example). [3] In Finland [4] and Indonesia, [5] the common separator between hours and minutes is a dot (18.45, for example).
National standard format is yyyy-mm-dd. [161] dd.mm.yyyy format is used in some places where it is required by EU regulations, for example for best-before dates on food [162] and on driver's licenses. d/m format is used casually, when the year is obvious from the context, and for date ranges, e.g. 28-31/8 for 28–31 August.
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According to this text, niàn is the smallest unit of time at 18 milliseconds and a shùn is 360 milliseconds. [8] It also describes larger units of time, including a tánzhǐ which is 7.2 seconds long, a luóyù which is 2 minutes 24 seconds long, and a xūyú , which is 1 ⁄ 30 of a day at 48 minutes long. [c]
[ss] refers to a zero-padded second between 00 and 60 (where 60 is only used to denote an added leap second). So a time might appear as either "T134730" in the basic format or "T13:47:30" in the extended format. ISO 8601-1:2019 allows the T to be omitted in the extended format, as in "13:47:30", but only allows the T to be omitted in the basic ...
Its hours are a secondary unit computed as precisely 3,600 seconds. [23] However, an hour of Coordinated Universal Time (UTC), used as the basis of most civil time, has lasted 3,601 seconds 27 times since 1972 in order to keep it within 0.9 seconds of universal time, which is based on measurements of the mean solar day at 0° longitude.