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<title>Converts a Gregorian date to Julian Day Count</title>
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<h1 class="refname">GregorianToJD</h1>
<p class="verinfo">(PHP 4, PHP 5)</p><p class="refpurpose"><span class="refname">GregorianToJD</span> — <span class="dc-title">Converts a Gregorian date to Julian Day Count</span></p>
</div>
<div class="refsect1 description" id="refsect1-function.gregoriantojd-description">
<h3 class="title">Description</h3>
<div class="methodsynopsis dc-description">
<span class="type">int</span> <span class="methodname"><strong>gregoriantojd</strong></span>
( <span class="methodparam"><span class="type">int</span> <code class="parameter">$month</code></span>
, <span class="methodparam"><span class="type">int</span> <code class="parameter">$day</code></span>
, <span class="methodparam"><span class="type">int</span> <code class="parameter">$year</code></span>
)</div>
<p class="para rdfs-comment">
Valid Range for Gregorian Calendar 4714 B.C. to 9999 A.D.</p>
<p class="para">
Although this function can handle dates all the way back to 4714
B.C., such use may not be meaningful. The Gregorian calendar was
not instituted until October 15, 1582 (or October 5, 1582 in the
Julian calendar). Some countries did not accept it until much
later. For example, Britain converted in 1752, The USSR in 1918
and Greece in 1923. Most European countries used the Julian
calendar prior to the Gregorian.
</p>
</div>
<div class="refsect1 parameters" id="refsect1-function.gregoriantojd-parameters">
<h3 class="title">Parameters</h3>
<p class="para">
<dl>
<dt>
<span class="term"><em><code class="parameter">month</code></em></span>
<dd>
<p class="para">
The month as a number from 1 (for January) to 12 (for December)
</p>
</dd>
</dt>
<dt>
<span class="term"><em><code class="parameter">day</code></em></span>
<dd>
<p class="para">
The day as a number from 1 to 31
</p>
</dd>
</dt>
<dt>
<span class="term"><em><code class="parameter">year</code></em></span>
<dd>
<p class="para">
The year as a number between -4714 and 9999
</p>
</dd>
</dt>
</dl>
</p>
</div>
<div class="refsect1 returnvalues" id="refsect1-function.gregoriantojd-returnvalues">
<h3 class="title">Return Values</h3>
<p class="para">
The julian day for the given gregorian date as an integer.
</p>
</div>
<div class="refsect1 examples" id="refsect1-function.gregoriantojd-examples">
<h3 class="title">Examples</h3>
<p class="para">
<div class="example" id="example-2248">
<p><strong>Example #1 Calendar functions</strong></p>
<div class="example-contents">
<div class="phpcode"><code><span style="color: #000000">
<span style="color: #0000BB"><?php<br />$jd </span><span style="color: #007700">= </span><span style="color: #0000BB">GregorianToJD</span><span style="color: #007700">(</span><span style="color: #0000BB">10</span><span style="color: #007700">, </span><span style="color: #0000BB">11</span><span style="color: #007700">, </span><span style="color: #0000BB">1970</span><span style="color: #007700">);<br />echo </span><span style="color: #DD0000">"</span><span style="color: #0000BB">$jd</span><span style="color: #DD0000">\n"</span><span style="color: #007700">;<br /></span><span style="color: #0000BB">$gregorian </span><span style="color: #007700">= </span><span style="color: #0000BB">JDToGregorian</span><span style="color: #007700">(</span><span style="color: #0000BB">$jd</span><span style="color: #007700">);<br />echo </span><span style="color: #DD0000">"</span><span style="color: #0000BB">$gregorian</span><span style="color: #DD0000">\n"</span><span style="color: #007700">;<br /></span><span style="color: #0000BB">?></span>
</span>
</code></div>
</div>
</div>
</p>
</div>
<div class="refsect1 seealso" id="refsect1-function.gregoriantojd-seealso">
<h3 class="title">See Also</h3>
<p class="para">
<ul class="simplelist">
<li class="member"> <span class="function"><a href="function.jdtogregorian.html" class="function" rel="rdfs-seeAlso">jdtogregorian()</a> - Converts Julian Day Count to Gregorian date</span></li>
<li class="member"> <span class="function"><a href="function.cal-to-jd.html" class="function" rel="rdfs-seeAlso">cal_to_jd()</a> - Converts from a supported calendar to Julian Day Count</span></li>
</ul>
</p>
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