View source for $DateChk

<p>
The <var>$DateChk</var> function determines whether a given date is valid. <var>$DateChk</var> returns a 1 if the date is valid. A 0 is returned if either the date is invalid or if the date does not match a format you specify.</p>

==Syntax==
<p>
The format of the <var>$DateChk</var> function is:</p>
<p class="syntax">$DateChk(<span class="term">format</span>, <span class="term">date</span>) 
</p>
<p>Where:</p>
<ul>
<li><var class="term">format</var> specifies the format of the date, which can be a combination of the following elements:</li>
<table class="thJustBold">
<tr>
<th>DD</th>
<td>Gregorian numeric day</td>
</tr>

<tr>
<th>DDD</th>
<td>Julian numeric date</td>
</tr>

<tr>
<th>MM</th>
<td>Numeric month</td>
</tr>

<tr>
<th>MON</th>
<td>Abbreviated month name</td>
</tr>

<tr>
<th>MONTH</th>
<td>Full month name</td>
</tr>

<tr>
<th>YY</th>
<td>Last two digits of numeric year (assumes that the year prefix is 19)</td>
</tr>

<tr>
<th>YYYY</th>
<td>Full numeric year </td>
</tr>

<tr>
<th>CYY</th>
<td>The century, plus the year. Century (C) is a single digit, where 0 represents 1900, 1 represents 2000, and so on.</td></tr>
</table>
<p>
Valid formats are:</p>
<ul>
<li>A format that has a month, day, and year element.</li>
<li>A Julian date format that has a year element and a day element in the format DDD. </li>
</ul>
<p>
Any EBCDIC characters except single quotes are allowed within the format. The format can be as many as 32 characters in length. </p>
</li>

<li><var class="term">date</var> specifies a date in the format indicated by the <var class="term">format</var> argument. The date can be as many as 36 characters in length. </li>
</ul>

==Example==
<p>
The following statement prints the value 0, because the month of February does not have 30 days. </p>
<p class="code">PRINT $datechk('MON. DD, YYYY','FEB. 30, 1999') 
</p>

[[Category:SOUL $functions]]