Date Range Dynamic Selection Variant

Hi Expert,

Not sure am I use a correct discussion forum. I would like to set SAP standard report date range with dynamic date variant. My criteria for the date is beginning of the month to yesterday date. Eg. today is 8-Jul-2015, date range should show from 1-Jul-2015 to 7-Jul-2015.

I checked existing date dynamic selection variables but no such condition. I can only set To Date with Current -1 but not From Date. Anyone can help ? Thank you.