convert to date format

[Anonymous]

Hi,

I am getting below error in date column. could you please help to convert to date format (mm/dd/yyyy)

"power bi DataFormat.Error: We couldn't parse the input provided as a Date value. Details: 44201"

Thanks in advance 

suren

[zzcc]

Hi, @Anonymous 

To create a measure like this:

Measure = (MAX('Table'[Column1])-DATE(1899,12,30))+DATE(1899,12,30)

or create a column:

col = ([Column1]-DATE(1899,12,30))+DATE(1899,12,30)

result:

Zerrick

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[mahoneypat]

You can add a custom column (or adapt a transform column step) with this formula

= try Date.From([Date]) otherwise Date.AddDays(#date(1900,1,1), Number.FromText([Date]))

Pat

[Anonymous]

Thank you Pat. Your expression works well but when date column has some text values(N/A..) it shows error

Suren

[zzcc]

Hi, @mahoneypat 

You are absolutely right, obviously I am still not familiar with the PoweQuery language. It definitely saves a lot of steps.
But what confuses me is that in Excel it seems that the first day is January 1, 1900, and the result I get after converting the numbers to dates in Power BI indicates that the first day should be December 30, 1899, which is a little strange.
But your formula is definitely correct anyway. Thanks for sharing.

@Anonymous  if you want to get result in Power Query, here is the improved M code:

let
    Source = Table.FromRows(Json.Document(Binary.Decompress(Binary.FromText("i45WMtY3MtU3MjAyVIrViVYyMTEyNgOzgOJGqOKWYBaYUFCKjQUA", BinaryEncoding.Base64), Compression.Deflate)), let _t = ((type nullable text) meta [Serialized.Text = true]) in type table [Column1 = _t]),
    #"Changed Type" = Table.TransformColumnTypes(Source,{{"Column1", type text}}),
    a = Table.AddColumn(#"Changed Type", "1899-12-30", each try Date.From([Column1]) otherwise Date.AddDays(#date(1899,12,30), Number.FromText([Column1])))//,
    //b = Table.AddColumn(a, "1900-1-1", each try Date.From([Column1]) otherwise Date.AddDays(#date(1900,1,1), Number.FromText([Column1])))
in
    a//b

Zerrick

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[mahoneypat]

Thanks for that correction.  I didn't check the math on the date change.  I checked it with today's date (44409 as integer in Excel), and had to update the formula to this instead.

= try Date.From([Date]) otherwise Date.AddDays(#date(1899,12,31), Number.FromText([Date])-1)

Pat

[Anonymous]

Thank you zerick.

But requirement is to convert this serial format(44236, 44239) to MM/DD/YYYY in query editor 

Suren

[zzcc]

Hi, @Anonymous 

measure

Column = 
var _1=([Column1]-DATE(1899,12,30))+DATE(1899,12,30)
return FORMAT(_1,"mm/dd/yyyy")

column

Measure = 
var _1=(MAX('Table'[Column1])-DATE(1899,12,30))+DATE(1899,12,30)
return FORMAT(_1,"mm/dd/yyyy")

 result:

In power query

let
    Source = Table.FromRows(Json.Document(Binary.Decompress(Binary.FromText("i45WMtY3MtU3MjAyVIrViVYyMTEyNgOzgOJGqOKWSrGxAA==", BinaryEncoding.Base64), Compression.Deflate)), let _t = ((type nullable text) meta [Serialized.Text = true]) in type table [Column1 = _t]),
    #"Changed Type" = Table.TransformColumnTypes(Source,{{"Column1", type text}}),
    #"Added Custom" = Table.AddColumn(#"Changed Type", "Custom", each try (Duration.From([Column1]))
otherwise null),
    #"Added Custom1" = Table.AddColumn(#"Added Custom", "Custom.1", each try(Date.From([Column1]))
otherwise null),
    #"Changed Type1" = Table.TransformColumnTypes(#"Added Custom1",{{"Custom", type duration}}),
    #"Added Custom2" = Table.AddColumn(#"Changed Type1", "Custom.2", each #date(1899,12,30)+[Custom]),
    #"Merged Columns" = Table.CombineColumns(Table.TransformColumnTypes(#"Added Custom2", {{"Custom.1", type text}, {"Custom.2", type text}}, "en-US"),{"Custom.1", "Custom.2"},Combiner.CombineTextByDelimiter("", QuoteStyle.None),"Merged"),
    #"Removed Columns1" = Table.RemoveColumns(#"Merged Columns",{"Custom", "Column1"}),
    #"Changed Type2" = Table.TransformColumnTypes(#"Removed Columns1",{{"Merged", type date}})
in
    #"Changed Type2"

Zerrick

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[Anonymous]

Thank you Zerrick.

Below expression works for me but encounter errors "Cannot convert value '' of type Text to type Number." when column has "" or "N/A". Could you please help me to fix 

Column2 =

var _1=([Column1]-DATE(1899,12,30))+DATE(1899,12,30)

return FORMAT(_1,"mm/dd/yyyy")

[zzcc · Accepted solution]

Hi, @Anonymous 

column:

Column = 
    IFERROR(FORMAT(('Table'[Column1]-DATE(1899,12,30))+DATE(1899,12,30),"mm/dd/yyyy"),BLANK())

measure:

Measure = 
   IFERROR(FORMAT((MAX('Table'[Column1])DATE(1899,12,30))+DATE(1899,12,30),"mm/dd/yyyy"),BLANK())

result:

Zerrick

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[amitchandak]

@Anonymous , do you have all values as number , that can days from 1-1-1970 or 1-1-1900

Date =date(1900,1,1) + [Days]

or

Date =date(1970,1,1) + [Days]

or

Can you share sample data and sample output in table format? Or a sample pbix after removing sensitive data.

[Anonymous]

Hi Amit,

My date field contains below values.Could you please suggest to format as mm/dd/yyyy

Thanks