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<h1>WEEKNUM Function</h1>
<p>The <b>WEEKNUM</b> function is one of the date and time functions. It used to return the number of the week the specified date falls within the year.</p>
<p>The <b>WEEKNUM</b> function syntax is:</p>
<p style="text-indent: 150px;"><b><em>WEEKNUM(serial-value [,weekday-start-flag])</em></b></p>
<p><em>where</em></p>
<p style="text-indent: 50px;"><b><em>serial-value</em></b> is a number representing the date within the week, entered using the <a href="Date.htm" onclick="onhyperlinkclick(this)">Date</a> function or other date and time function.</p>
<p style="text-indent: 50px;"><b><em>weekday-start-flag</em></b> is a numeric value used to determine the type of the value to be returned. It can be one of the following:</p>
<table style="width: 40%">
<tr>
<td><b>Numeric value</b></td>
<td><b>Weekday Sequence</b></td>
</tr>
<tr>
<td>1 or omitted</td>
<td>from Sunday to Saturday</td>
</tr>
<tr>
<td>2</td>
<td>from Monday to Sunday</td>
</tr>
</table>
<p>To apply the <b>WEEKNUM</b> function,</p>
<ol>
<li>select the cell where you wish to display the result,</li>
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<li>click the <b>Insert function</b> <img alt="Insert function icon" src="../images/insertfunction.png" /> icon situated at the top toolbar,
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<br />or right-click within a selected cell and select the <b>Insert Function</b> option from the menu,
<br />or click the <img alt="Function icon" src="../images/function.png" /> icon situated at the formula bar,
</li>
<li>select the <b>Date and time</b> function group from the list,</li>
<li>click the <b>WEEKNUM</b> function,</li>
<li>enter the required arguments separating them by commas,</li>
<li>press the <b>Enter</b> button.</li>
</ol>
<p>The result will be displayed in the selected cell.</p>
<p style="text-indent: 150px;"><img alt="WEEKNUM Function" src="../images/weeknum.png" /></p>
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