用户可以输入一个日期，包含年月日。然后可以查询所输入的日期是否正确，明天的日期，以及在这一年中你所想查询的那个月的具体天数-The user can enter a date that contains date. Then you can check the date entered is correct, tomorrow' s date, and the number of specific days of the month you want to check in this ye