本程序能提供用户查询所输入的日期是当年的第几天和当天是星期几，程序的使用方便快捷，不必查表，只须输入日期程序就会马上算出结果，为用户一些工作需要上带来一定的帮助-This program can provide the user query is then input the date of the first few days and the day of the week, fast and easy to use program, without look-up table, only enter the date the program will immediately calculate the results for the needs of users with some of the work to be helpful