时间与日期的设置，实现类似Windows操作系统控制面板“日期和时间”的功能。它显示1980-2099年内某月的日历（含月、日、星期），可以反应闰月情况。并显示当前系统时间。并允许用户重新设置当前计算机系统年月日的时间。-Time and date settings to achieve a similar Windows operating system control panel " Date and Time"　function. It displays a month calendar years 1980-2099 (including month, day, week), the situation can react leap month. And displays the current system time. And allows the user to set the time of the current computer system date.