drools-eclipse/org.guvnor.eclipse.webdav/src/kernel/org/eclipse/webdav/internal/kernel/utils/DateTime.java
protected boolean setDateTime(String date, String pattern) {
        boolean dateChanged = true;
        dateFormat.applyPattern(pattern);
        try {
            setDateTime(dateFormat.parse(date));
        } catch (ParseException e) {
            dateChanged = false;
        }
        return dateChanged;
    }
protected boolean setDateTime(String date, String pattern) {
        boolean dateChanged = true;
        dateFormat.applyPattern(pattern);
        try {
            setDateTime(dateFormat.parse(date));
        } catch (ParseException e) {
            dateChanged = false;
        }
        return dateChanged;
    }
Do nothing if date format is not supported.