Calculate measure from selected value from the slicer

[unknown_anony]

Hello
I have few fact table(Revenue) which have the data for 2022 & 2023 as of now. I am creating a calendar table by below formula from the  facts table reveue

VAR _StartDate= FIRSTDATE(ALL('Revenue'[Invoicing Cycle]))

VAR _EndDate = LASTDATE(ALL('Revenue'[Invoicing Cycle]))                                                                  

RETURN

CALENDAR(_StartDate, _EndDate)

This is the below calculation i have to calculate

(Count of HeadCount numbers for Current period - count of HeadCount for Comparison period)

I will be having two slicer of current period and other one is comparison table .
When a user select in current period JUN 23 and Comparsion period MAR 22, the measure should calculte the count as per the above formula.
Next year when there will be the data for 2024 in the facts table , current period should be 2024 and the comparison period would be the rest of the year. It is a bit complicated situation. Will i have to create two separate calendar table  for current and comparison period or is there any better solution for this issue
How to solve this issue?
All suggestions are welcome

Thanks in advnace

[unknown_anony]

It worked. thank you😊

[miTutorials · Accepted solution]

I believe this is the solution you are looking for, let me know if this helps.

Compare any week/Year using 2 Slicers as input in PowerBI | MiTutorials - YouTube