SECONDS(1)                                             SECONDS(1)

          seconds - convert human-readable date (and time) to seconds
          since epoch

          seconds date ...

          Seconds prints the number of seconds since 1 Jan 1970 corre-
          sponding to one or more human-readable dates. Each date must
          be one argument; it will usually be necessary to enclose it
          in quotes.

          Seconds accepts a somewhat wider range of input than just
          output from date(1). The main requirement is that the date
          must be fully specified, with a day of month, month and year
          in any order.  The month must be an English name (or abbre-
          viation), not a number, and the year must contain 4 digits.
          Unambiguous time-zone names are understood (i.e., not `IST')
          or time zones may be written as ±hhmm. Case is ignored.

          Print the names of all files under `.'  modified since the
          start of 23 May 2011.

               du -ta | awk '$1 >= '^`{seconds '23 may 2011'}^' {print $2}'


          date(1), du(1), mtime(1), ctime(2)

          All-numeric dates, popular in the USA, are simply ambiguous,
          more so if the year is truncated to 2 digits.

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