在Excel中将Week NUM转换为Week Beg日期

Question

I have the below formula to give me the week ending of a week num, how can I get the date of the week beginning from this?

=DATE(YEAR(TODAY()),1,1)+(7-WEEKDAY(DATE(YEAR(TODAY()),1,1))-6)+(A2*7)

when A2 is 10 for example and B2 is the date.

thanks

Answer 1

Are your weeks ISO weeks? If so then that formula might work for this year but it will be wrong in 2016 because it will give the end date of week 1 as 3rd Jan when it should be 10th Jan

I would use this formula for start date (a Monday)

=DATE(YEAR(TODAY()),1,A2*7-2)-WEEKDAY(DATE(YEAR(TODAY()),1,3))

then just add 6 for the end date

=DATE(YEAR(TODAY()),1,A2*7+4)-WEEKDAY(DATE(YEAR(TODAY()),1,3))