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(tar) Time of day items

Info Catalog (tar) Calendar date items (tar) Date input formats (tar) Time zone items
 
 Time of day items
 =================
 
    A "time of day item" in date strings specifies the time on a given
 day.  Here are some examples, all of which represent the same time:
 
      20:02:0
      20:02
      8:02pm
      20:02-0500      # In EST (U.S. Eastern Standard Time).
 
    More generally, the time of the day may be given as
 `HOUR:MINUTE:SECOND', where HOUR is a number between 0 and 23, MINUTE
 is a number between 0 and 59, and SECOND is a number between 0 and 59.
 Alternatively, `:SECOND' can be omitted, in which case it is taken to
 be zero.
 
    If the time is followed by `am' or `pm' (or `a.m.' or `p.m.'), HOUR
 is restricted to run from 1 to 12, and `:MINUTE' may be omitted (taken
 to be zero).  `am' indicates the first half of the day, `pm' indicates
 the second half of the day.  In this notation, 12 is the predecessor of
 1: midnight is `12am' while noon is `12pm'.  (This is the zero-oriented
 interpretation of `12am' and `12pm', as opposed to the old tradition
 derived from Latin which uses `12m' for noon and `12pm' for midnight.)
 
    The time may alternatively be followed by a time zone correction,
 expressed as `SHHMM', where S is `+' or `-', HH is a number of zone
 hours and MM is a number of zone minutes.  When a time zone correction
 is given this way, it forces interpretation of the time relative to
 Coordinated Universal Time (UTC), overriding any previous specification
 for the time zone or the local time zone.  The MINUTE part of the time
 of the day may not be elided when a time zone correction is used.  This
 is the best way to specify a time zone correction by fractional parts
 of an hour.
 
    Either `am'/`pm' or a time zone correction may be specified, but not
 both.
 
Info Catalog (tar) Calendar date items (tar) Date input formats (tar) Time zone items
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