计算星期几的开始日期和结束日期

Question

I'm using the following formulas to obtain the start date and end date of the week number, given the week number and the year:

Start of week: =MAX(DATE(A2,1,1),DATE(A2,1,1)-WEEKDAY(DATE(A2,1,1),2)+(B2-1)*7+1)

End of week: =MIN(DATE(A2+1,1,0),DATE(A2,1,1)-WEEKDAY(DATE(A2,1,1),2)+B2*7)

It seems to work well except that week 1 of 2019 begins on 31-12-2018 but my formula for the start date of the week 1 shows it as 01-01-2019 . What is the problem with my formula?

Answer 1

只需从结束日期公式中减去6

=(MIN(DATE(A2+1,1,0),DATE(A2,1,1)-WEEKDAY(DATE(A2,1,1),2)+B2*7))-6

Answer 2

As I noted in my comment, the easiest way is just to subtract 6 from your end date. If your data is in a table, your formula would be =[@EndDate]-6 . Otherwise, it would be something like =E2-6 .