这是一款用multisim画图而成的数字万年历，月日的各位用七段数码管显示，十位用LED的亮灭显示。星期用七段数码管显示。-This is a drawing made with multisim digital calendar, you use the day of the seven-segment LED display, ten off with bright LED display. Week segment digital tube display.

I2C Serial Real-Time Clock serial real-time clock is a low-power clock/calendar with two programmable time-of-day alarms and a programmable square-wave output. Address and data are transferred serially through an I2C* bus.

使用1582年作为重大转变的日期，进行各类日期日历万年历编码-Use 1582 as the date of major changes，Various types of calendar calendar date code