Dynamic dates in Azure Data Factory

Dear Folks
I am trying to copy the data from the Azure SQL table to the CSV file in Azure Data Factory.
CSV Filename must be appended with below date
Filename_11_07
Where Filename --> comes from dynamic content
11 --> month
07 --> current date of last Sunday (Current date is 10th of Nov)
Would it be possible to manipulate the dates in dynamic content? Any other way to achieve this?

Regards
Santosh