这个程序目前有五个功能：1.查看当前年历或月历；2.搜索某年年历或某月月历；3.查询某天是星期几；4.判断某年是否为闰年5.查询历史上某年是该年的第几天-This program currently has five functions: 1. View the current calendar or calendar　2. Search for a calendar or a calendar month　3. Query the day of the week　4. To determine whether a leap year 5. Query history of a The year is the first few days of the year.