Fixed in power bi

HI,

   I am very new to power bi. acutally i am trying to convert TABLEAU app into power bi.

in a chart there is caluclated dimension created as below

{ FIXED [Year Week]: MAX([End Time])}

Year Week is year and week from a date field

so to do this power bi i did as follows

Year Week = FORMAT([end_time].[Date],"yyyy")&WEEKNUM([end_time].[Date],2)  ---> in text format

And for { FIXED [Year Week]: MAX([End Time])} i did below

CALCULATE(MAX([end_time].[Date]),ALL(Year Week))   ---->date format

but not getting the output

can anyone help me on this