Max date

Hi , toum 

According to your description, you want to create a date slicer and you need to get the max date in table in the selected date range you selected.

Here are teh steps you can refer to :
(1)This is my test data:

(2)We can click "New Table" to  create a date table as a slicer:

Date SLicer = CALENDAR(FIRSTDATE('Table'[Date]) , LASTDATE('Table'[Date]))

(3)Then we can create a measure :

Max Date = var _min_date = MIN('Date SLicer'[Date])
var _max_date = MAX('Date SLicer'[Date])
var _t = FILTER(ALLSELECTED('Table') ,'Table'[Date]>=_min_date && 'Table'[Date]<= _max_date)
return
MAXX(_t ,[Date])

(4)Then we can put the filed we need on the visual and then we can meet your need the result is as follows:

Thank you for your time and sharing, and thank you for your support and understanding of PowerBI! 

Best Regards,

Aniya Zhang

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