qlik sense comparison between range of dates

[Alaeddin]

Hello, 

i want the calendar to select two range of dates to compare them for sales 

but in the sheet i keep getting same data for the overall for last year and this year 
and 0 for last year in month to date 
 

i want a fix for this so i can select two (range ) dates like a holiday week in apr 2022 and holiday week in apr 2023

( have this for date in data load  ) 

date(Date#(Date,'DD-MMM-YYYY')) as Date,Year,
Month,
Day,
DateNum,

[Chanty4u]

First date range 

Sum({<Date = {">=$(vStartDate1)<=$(vEndDate1)"}>} Sales)

second date range 

Sum({<Date = {">=$(vStartDate2)<=$(vEndDate2)"}>} Sales)

[Alaeddin]

hello thanks for the reply ,

how can i use this in date picker( calendar )