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https://issues.apache.org/jira/browse/VALIDATOR-221?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12469084
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Carsten Drossel commented on VALIDATOR-221:
-------------------------------------------

According to the Javadoc ("Checks if the field is a valid date.", "true if the 
value can be converted to a Date.") I guess I'm using the method in an 
inappropriate way by using a date format for a 'partial date' that does not 
include a year. In this case I agree that this issue is not a bug.

If DateValidator can be used for partial dates however, "02/29" should be valid 
regardless of the year. It makes sense to search for people born on a February 
29th. February 29th exists while February 30th doesn't.

> DateValidator considers "02/29" with format "MM/dd" invalid
> -----------------------------------------------------------
>
>                 Key: VALIDATOR-221
>                 URL: https://issues.apache.org/jira/browse/VALIDATOR-221
>             Project: Commons Validator
>          Issue Type: Bug
>    Affects Versions: 1.3.1 Release
>         Environment: Windows XP, Java 1.5.0_04
>            Reporter: Carsten Drossel
>            Priority: Minor
>
> When the date pattern contains only day and month the isValid(..)-method of 
> DateValidator returns false for the value Feb. 29th.
> Here is a JUnit test that fails:
> public void testFebruary29th() throws Exception {
>   assertTrue( DateValidator.getInstance().isValid( "02/29", "MM/dd", true ) );
> }
> The DateValidator uses the parse(..)-method of SimpleDateFormat for the 
> validation. This method appears to complete any date using 01/01/1970 00:00. 
> Since 1970 was not a leap year a ParseException is thrown for the input 
> "02/29" with the format "MM/dd" because 02/29/1970 is not a valid date.
> But IMHO "02/29" should be valid. An example where it makes sense is a search 
> for persons with a certain birthday. 

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