php man page for gregoriantojd

GREGORIANTOJD(3)							 1							  GREGORIANTOJD(3)

gregoriantojd - Converts a Gregorian date to Julian Day Count

SYNOPSIS
       int gregoriantojd (int  $month, int  $day, int  $year)

DESCRIPTION
	Valid Range for Gregorian Calendar 4714 B.C. to 9999 A.D.

	Although  this	function  can  handle  dates all the way back to 4714 B.C., such use may not be meaningful. The Gregorian calendar was not
       instituted until October 15, 1582 (or October 5, 1582 in the Julian calendar). Some countries did not accept it until much later. For exam-
       ple,  Britain  converted in 1752, The USSR in 1918 and Greece in 1923. Most European countries used the Julian calendar prior to the Grego-
       rian.

PARAMETERS
	      o $month
		- The month as a number from 1 (for January) to 12 (for December)

	      o $day
		- The day as a number from 1 to 31

	      o $year
		- The year as a number between -4714 and 9999

RETURN VALUES
	The julian day for the given gregorian date as an integer.

EXAMPLES
       Example #1

	      Calendar functions

	      <?php
	      $jd = GregorianToJD(10, 11, 1970);
	      echo "$jd
";
	      $gregorian = JDToGregorian($jd);
	      echo "$gregorian
";
	      ?>

SEE ALSO
       jdtogregorian(3), cal_to_jd(3).

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