multiple dates in columns for column chart

Radinooo Please transform the data as required for the chart in "Power Query Editor", here is the steps I've followed:

let
    Source = Table.FromRows(Json.Document(Binary.Decompress(Binary.FromText("lZK7DoMwDEV/BXlGVmzyIH/BHjF07YQQ/69SVTTIgRBvHs71PY6SEkyvdSPogR16ZEPjPpPFcMxMGI95Wt8Ec59g2UMsQ+4h9G0aKqHuB/MfthImHG8acshVbika/IVCJ52DgM4axUZ51AWcN8eWejJNFN1T2Y648ozlzkFF22f6ZOJUtFeZBBVd+1olHTXebJro+QM=", BinaryEncoding.Base64), Compression.Deflate)), let _t = ((type text) meta [Serialized.Text = true]) in type table [Parts = _t, #"1st" = _t, #"2nd" = _t, #"3th" = _t, project = _t]),
    #"Changed Type" = Table.TransformColumnTypes(Source,{{"Parts", type text}, {"1st", type date}, {"2nd", type date}, {"3th", type date}, {"project", type text}}),
    #"Unpivoted Only Selected Columns" = Table.Unpivot(#"Changed Type", {"1st", "2nd", "3th"}, "Attribute", "Value"),
    #"Grouped Rows" = Table.Group(#"Unpivoted Only Selected Columns", {"Value", "project"}, {{"Count", each Table.RowCount(_), type number}}),
    #"Sorted Rows" = Table.Sort(#"Grouped Rows",{{"Value", Order.Ascending}}),
    #"Pivoted Column" = Table.Pivot(#"Sorted Rows", List.Distinct(#"Sorted Rows"[project]), "project", "Count"),
    #"Inserted Addition" = Table.AddColumn(#"Pivoted Column", "Addition", each [Prj1] + [Prj2], type number),
    #"Renamed Columns" = Table.RenameColumns(#"Inserted Addition",{{"Addition", "Total"}}),
    #"Changed Type1" = Table.TransformColumnTypes(#"Renamed Columns",{{"Value", type date}, {"Prj1", Int64.Type}, {"Prj2", Int64.Type}, {"Total", Int64.Type}})
in
    #"Changed Type1"

The output will be as below :

Now, we can create the Chart visual as below (Please note, the "Type" property for x-axis need to be changed as "Categorical")

Hello,

Thank you for prompt action.

I forgot to say I'm beginner in Power BI (only about 5days of exp.)

But I already successfully modiefied Query settings as you suggested.

It works for me.

Thank you

best regards

Rado