import java.util.regex.Matcher;
import java.util.regex.Pattern;
public class DateRegex {
public static void main(String[] args) {
String DatePattern = "^(?:([0-9]{4}-(?:(?:0?[1,3-9]|1[0-2])-(?:29|30)|"
+ "((?:0?[13578]|1[02])-31)))|"
+ "([0-9]{4}-(?:0?[1-9]|1[0-2])-(?:0?[1-9]|1\\d|2[0-8]))|"
+ "(((?:(\\d\\d(?:0[48]|[2468][048]|[13579][26]))|"
+ "(?:0[48]00|[2468][048]00|[13579][26]00))-0?2-29)))$";
Pattern p = Pattern.compile(DatePattern);
Matcher m = p.matcher("2008-2-29");
boolean b = m.matches();
if (b) {
System.out.println("matches");
} else
System.out.println("no matches");
}
}
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