code: public static boolean isBirthday(CharSequence value) {
  		if (isMactchRegex(BIRTHDAY, value)) {
  			Matcher matcher = BIRTHDAY.matcher(value);
  			if (matcher.find()) {
  				int year = Integer.parseInt(matcher.group(1));
  				int month = Integer.parseInt(matcher.group(3));
  				int day = Integer.parseInt(matcher.group(5));
  				return isBirthday(year, month, day);
  			}
  		}
  		return false;
  	}
docs: 验证是否为生日<br>
  只支持以下几种格式：
  <ul>
  <li>yyyyMMdd</li>
  <li>yyyy-MM-dd</li>
  <li>yyyy/MM/dd</li>
  <li>yyyyMMdd</li>
  <li>yyyy年MM月dd日</li>
  </ul>
  
  @param value 值
  @return 是否为生日