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<p>(1979). Unix calendar programs checks current directory or user directories for files with calendar entries (date separated with tab character) and prints lines that begin with today's date or tomorrow's. Calendar implementation shipped with Linux systems is from <a href="page.php?w=FreeBSD">FreeBSD</a>.There is a separate cal program that just prints a calendar for a month or a year and the date of Easter originally from <a href="page.php?w=Research_Unix">Version 1 AT&T UNIX</a> (1971). Free implementation ncal appeared in FreeBSD 2.2.6.Alternative</p><p>
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