docs: public static boolean isBirthday(int year, int month, int day) {
  		// 验证年
  		int thisYear = DateUtil.thisYear();
  		if (year < 1900 || year > thisYear) {
  			return false;
  		}
  
  		// 验证月
  		if (month < 1 || month > 12) {
  			return false;
  		}
  
  		// 验证日
  		if (day < 1 || day > 31) {
  			return false;
  		}
  		if ((month == 4 || month == 6 || month == 9 || month == 11) && day == 31) {
  			return false;
  		}
  		if (month == 2) {
  			if (day > 29 || (day == 29 && false == DateUtil.isLeapYear(year))) {
  				return false;
  			}
  		}
  		return true;
  	}