<div>
It's not broken.<br />
<br />
The issue is that the weeks start on Monday. &nbsp;<a href="http://php.net/manual/en/function.date.php" rel="ugc">http://php.net/manual/en/function.date.php</a><br />
<br />

<pre><code id="code-20-36950504-1">    January 2011
Su Mo Tu We Th Fr Sa
                   1
 2  3  4  5  6  7  8
 9 10 11 12 13 14 15
16 17 18 19 20 21 22
23 24 25 26 27 28 29
30 31</code></pre>
<br />
January 1st and 2nd thus belong to 2010 because they are before the first Monday. &nbsp;52 is correct.
</div>


It's not broken.

The issue is that the weeks start on Monday.  http://php.net/manual/en/function.date.php [http://php.net/manual/en/function.date.php]



    January 2011
Su Mo Tu We Th Fr Sa
                   1
 2  3  4  5  6  7  8
 9 10 11 12 13 14 15
16 17 18 19 20 21 22
23 24 25 26 27 28 29
30 31


January 1st and 2nd thus belong to 2010 because they are before the first Monday.  52 is correct.

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<div class="content wysiwyg-content">
Hi Experts!<br />
<br />
Why first days of year can be in a week of previous year when using:<br />
<br />
echo date(&quot;W&quot;, strtotime(&quot;2011-01-01&quot;));<br />
<br />
It returns 52.<br />
<br />
Somebody can help me to fix it?<br />
<br />
Thanks in advance!
</div>
</div>


Hi Experts!

Why first days of year can be in a week of previous year when using:

echo date("W", strtotime("2011-01-01"));

It returns 52.

Somebody can help me to fix it?

Thanks in advance!

date(&quot;W&quot;) returns 52 to first days in a year

PHP is a widely-used server-side scripting language especially suited for web development, powering tens of millions of sites from Facebook to personal WordPress blogs. PHP is often paired with the MySQL relational database, but includes support for most other mainstream databases. By utilizing different Server APIs, PHP can work on many different web servers as a server-side scripting language.

date(&quot;W&quot;) returns 52 to first days in a year

date("W") returns 52 to first days in a year