该程序是以STC89C52为核心，只利用内部寄存器编写的万年历，外加独立键进行调表，而且可以自动识别闰年和平年（即自动识别二月份是多少天）-The program is based on STC89C52 as the core, using only the internal registers to write the calendar, plus independent key tune table, and can automatically recognize leap year Year of Peace (automatic identification is the number of days in February)