Get period context

Considering  the test i got this

Filtered period:=IF(
                                 FIRSTNONBLANK(Tiempo[Month],1) = LASTNONBLANK(Tiempo[Month],1)
                                ,FIRSTNONBLANK(Tiempo[Month],1)
                                ,FIRSTNONBLANK(Tiempo[Month],1) & " ~ " & LASTNONBLANK(Tiempo[Month],1) )

Tecnically this answer my question, what do you think Sean Anonymous

UPDATE:

After do some test i found that FIRSTNONBLANK(Tiempo[Month]) get the first month order alphabetically because i want to show something like 'Jan-2016' and this is not the order I want. so I had to use FIRSTDATE to get the correct dates order. Finally this is the measure that resolve the problem

Filtered period:=IF(
                  FORMAT(FIRSTDATE(DimDate[Date]),"M")+ FORMAT(FIRSTDATE(DimDate[Date]),"yyyy") = 
                        FORMAT(LASTDATE(DimDate[Date]),"M") +  FORMAT(LASTDATE(DimDate[Date]) ,"yyyy")
                  ,FORMAT(FIRSTDATE(DimDate[Date]),"MMM") & "-" & FORMAT(FIRSTDATE(DimDate[Date]),"yyyy")
                  ,FORMAT(FIRSTDATE(DimDate[Date]),"MMM") & "-" & FORMAT(FIRSTDATE(DimDate[Date]),"yyyy")
                        & " ~ " & FORMAT(LASTDATE(DimDate[Date]),"MMM") & "-" & FORMAT(LASTDATE(DimDate[Date]) ,"yyyy")
 )

I hope it will be usefull for someone