View source for $DateChk

<p>The $DATECHK function determines whether a given date is valid. $DATECHK 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>
<b>Syntax</b>
<p>The format of the $DATECHK function is:</p>
<p class="code">$DATECHK(format, date) 
</p>
<p>where:</p>
<ul>
<li>format specifies the format of the date, which can be a combination of the following elements:</li>
<table>
<tr>
<td>DD</td>
<td>Gregorian numeric day</td>
</tr>
<tr>
<td>DDD</td>
<td>Julian numeric date</td>
</tr>
<tr>
<td>MM</td>
<td>Numeric month</td>
</tr>
<tr>
<td>MON</td>
<td>Abbreviated month name</td>
</tr>
<tr>
<td>MONTH</td>
<td>Full month name</td>
</tr>
<tr>
<td>YY</td>
<td>Last two digits of numeric year (assumes that the year prefix is 19)</td>
</tr>
<tr>
<td>YYYY</td>
<td>Full numeric year </td>
</tr>
<tr>
<td>CYY</td>
<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>
</li>
</ul>
<p>A format that has a month, day, and year element</p>
<p>A Julian date format that has a year element and a day element in the format DDD </p>
<p>Any EBCDIC characters except single quotes are allowed within the format. The format can be as many as 32 characters in length. </p>
<ul>
<li>date specifies a date in the format indicated by the format argument. The date can be as many as 36 characters in length. </li>
</li>
</ul>
<b>Example</b>
<p class="code">PRINT $DATECHK('MON. DD, YYYY','FEB. 30, 1999') 
</p>
<p>prints the value 0 because the month of February does not have 30 days.   </p>
[[Category:SOUL $functions]]