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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").
Returns the hour in 12-hours format for the hour in 24-hour format (between 0 and 24) in parameter: 00 (midnight at start of day) is normally 12 AM for the whole morning hour between 00:00 and 00:59. 01..11 (end of night and morning) is unambiguously 01..11 AM. 12 (noon) is normally 12 PM for the whole afternoon hour between 12:00 and 12:59.
For example, Thanksgiving is defined as being on "the fourth Thursday in November". Some such definitions are more complex. For example, Election Day is defined as "the Tuesday next after the first Monday in the month of November" or "the first Tuesday after November 1". [14] Calendars mostly show Sunday as the first day of the week.
For 12-hour time, the point format (for example "1.45 p.m.") is in common usage and has been recommended by some style guides, including the academic manual published by Oxford University Press under various titles, [8] as well as the internal house style book for the University of Oxford, [9] that of The Guardian [10] and The Times newspapers.
However, seconds are usually left out if the additional precision is not required; for example: 23.59, or sometimes 23.59.00. Leading zeros are mostly used in time notation (i.e. 04.00 is more common than 4.00). They can sometimes even be spoken, as a way to avoid am/pm ambiguity. In spoken Swedish however, the 12-hour clock is much more common.
There are 28 shifts per employee in a six-week cycle (i.e. 42 days), this adds up to an average of 56 hours worked per week with 12-hour shifts, or 37 + 1 ⁄ 3 hours per week with 8-hour shifts. Three groups are needed for each time span, i.e. to cover the whole day and week a company needs 6 groups for 12-hour shifts or 9 groups for 8-hour ...
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Selecting a clock format, such as the 24-hour clock (00:00–23:59, most common internationally) or the 12-hour clock (12:00 a.m.–11:59 p.m., most common in the US and parts of Africa). Select a time zone, such as Coordinated Universal Time (UTC), or one of the other time zones such as for example the Central European Time (CET) used in most ...