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<HTML
><HEAD
><TITLE
>GregorianToJD</TITLE
><META
NAME="GENERATOR"
CONTENT="Modular DocBook HTML Stylesheet Version 1.57"><LINK
REL="HOME"
TITLE="PHP Manual"
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><H1
><A
NAME="function.gregoriantojd"
>GregorianToJD</A
></H1
><DIV
CLASS="refnamediv"
><A
NAME="AEN6238"
></A
><P
> (PHP3 , PHP4 )</P
>GregorianToJD --
Converts a Gregorian date to Julian Day Count
</DIV
><DIV
CLASS="refsect1"
><A
NAME="AEN6241"
></A
><H2
>Description</H2
><DIV
CLASS="funcsynopsis"
><A
NAME="AEN6243"
></A
><P
></P
><P
><CODE
><CODE
CLASS="FUNCDEF"
>int <B
CLASS="function"
>gregoriantojd</B
></CODE
> (int month, int day, int year)</CODE
></P
><P
></P
></DIV
><P
> Valid Range for Gregorian Calendar 4714 B.C. to 9999 A.D.</P
><P
> Although this software 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 example, Britain converted in 1752, The USSR in 1918
and Greece in 1923. Most European countries used the Julian
calendar prior to the Gregorian.
<TABLE
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CLASS="EXAMPLE"
><TR
><TD
><DIV
CLASS="example"
><A
NAME="AEN6255"
></A
><P
><B
>Example 1. Calendar functions</B
></P
><TABLE
BORDER="0"
BGCOLOR="#E0E0E0"
WIDTH="100%"
><TR
><TD
><PRE
CLASS="programlisting"
> <?php
$jd = GregorianToJD (10,11,1970);
echo "$jd\n";
$gregorian = JDToGregorian ($jd);
echo "$gregorian\n";
?>
</PRE
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