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ISO 8601. International standard ISO 8601 ( Representation of dates and times) defines unambiguous written all-numeric big-endian formats for dates, such as 2022-12-31 for 31 December 2022, and time, such as 23:59:58 for 23 hours, 59 minutes, and 58 seconds. These standard notations have been adopted by many countries as a national standard, e ...
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. This system, as opposed to the 12-hour clock, is the ...
On 18 September 2042, the Time of Day Clock (TODC) on the S/370 IBM mainframe and its successors, including the current zSeries, will roll over. [55] Older TODCs were implemented as a 64-bit count of 2 −12 microsecond (0.244 ns) units, and the standard base was 1 January 1900, UT. In July 1999 the extended TODC clock was announced, which ...
The 12-hour clock is a time convention in which the 24 hours of the day are divided into two periods: a.m. (from Latin ante meridiem, translating to "before midday") and p.m. (from Latin post meridiem, translating to "after midday").
An Egyptian method of determining the time during the night, used from at least 600 BC, was a type of plumb-line called a merkhet. A north–south meridian was created using two merkhets aligned with Polaris, the north pole star. The time was determined by observing particular stars as they crossed the meridian. [24]
June 2, 2009. ( 2009-06-02) Earth 2100 is a television program that was presented by ABC on June 2, 2009, aired on the History Channel in January 2010, and was shown throughout the year. The two-hour special, which Bob Woodruff hosted, looked at what "a worst-case" future might entail if people do nothing about current or impending issues that ...
The Expo '70 time capsule is located near Osaka Castle, donated by Panasonic and the Mainichi Newspapers.It was opened for the first time in 2000, [13] and then the second time expected to be opened in 2100. [14]
24 h to 12 h. Template documentation. This template converts a time from 24-hour to 12-hour format. It accepts one optional unnamed parameter. If the parameter is absent or neither a valid time nor number, the template returns the UTC at the time the page was generated. The parameter can be a plain hour. The parameter can be an hour and minutes.