Having a dynamic flag depending on selected date

// Create a filtering measure that
// will return 1 for the restaurants
// you want to see and 0 otherwise.
// Then, when you display your restaurants
// in a table or matrix, just put this
// measure in the Filter Pane of the visual
// and set the "is" condition to 1.

[Show Restaurant?] =
IF( ISINSCOPE( Venue[Restaurant] ),
    var OpenDate = SELECTEDVALUE( Venue[OpeningDate] )
    var ComparisonYear = SELECTEDVALUE( CompareYear[CompareYear] )
    var BaseMonthNumber = MONTH( MIN( 'Date Table'[Date] ) )
    var CutoffDate = DATE( ComparisonYear, BaseMonthNumber, 1 )
    var ShouldShow = OpenDate < CutoffDate
    return
        INT( ShouldShow )
)