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Date: Mon, 29 Jan 2007 05:38:49 -0800 (PST)
From: "Carsten Drossel (JIRA)" <jira@apache.org>
To: commons-dev@jakarta.apache.org
Subject: [jira] Created: (VALIDATOR-221) DateValidator considers "02/29"
 with format "MM/dd" invalid
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DateValidator considers "02/29" with format "MM/dd" invalid
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                 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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