MEMO excel 日期函数 2020年4月9日 ht 当前时间:now()当前日期:today()当前年份:year(today())当前月份:month(today())当前天:day(today())当前星期(中文):text(today(),”aaaa”)当前星期(英文):text(today(),”dddd”)本年第几周:weeknum(today())本年第几天:today()-“1-1″+1