相对于年份的动态周数

Question

I'm trying to to retrieve monthly the week number of the year, sounds like a stupid question, but this is what I want to look like:

For the cell C1 I have created a drop down list based on B1 => =TEXT(TODAY();"[$-0809]mmmm") and also the Weeks (C2:C6) are retrieved by HLookup Function.

The idea is that I only need a dynamic Week format, such as C1:C6, but I didn't find another way outside the one I've used and I also need to transpose it in VBA . Is there an easier method? I could use your hints/ideas. On a new sheet which is exported monthly I need to show the 4/5 weeks of each month, being different from month to month.

Answer 1

Use the Weeknum function: =WEEKNUM(DATE(2019,3,1),2) will return the first week of the month and =WEEKNUM(EOMONTH(DATE(2019,3,1),0),2) will return the last week of the month.

So put …

• in B2 =WEEKNUM(DATE(YEAR(TODAY()),$B$1,1),2 )
• in B3 =IFERROR(IF(B2+1<=WEEKNUM(EOMONTH(DATE(YEAR(TODAY()),$B$1,1),0),2 ),B2+1,""),"") and pull it down to get the following result:

If you now change the month number in B1 it calculates the rest automatically:

Note that there are different official week numbering systems, while the most common would be the ISO week date . That means that january 1st is not always week number 1!