Importing dates from Excel into Sharepoint list

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I've tried various forums for answers to this issue but none have succeeded. I have an extensive spreadsheet that I want to import a Sharepoint list. The issue is the date column. irrespective of how I format the date in Excel it does not conform to the date/time format in Sharepoint.


The error message (note the error varies depending on how I format in excel)


I am sure there should be a simple function fix but I suspect I don't have sufficient knowledge to understand potential solutions offered on other forums.


any help/advice gratefully received.


6 Replies


Note the example shown is a test file I'm using as the working sheet is too large to easily manipulate

@TSimsD Excel stores dates as an integer of the number of days since 30 December 1899. So you need to convert that integer to a date before your flow can use the output in SharePoint.


So you will need to add Compose control.


The table in my spreadsheet has a column called Time:



In your flow you'll need to convert that column using an expression in a Compose control:

formatDateTime(addDays('1900-01-01', add(int(items('Apply_to_each')?['Time']),-2)), 'yyyy-MM-dd')


(the way I do it is to use 1900-01-01 for ease of remembering rather than 1899-12-30, then take off 2 days from the result)



You then use the output of that Compose in the relevant field in your SharePoint Create item action.


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Hello @RobElliott 


I have the same scenario as your solution and have tried your expression in my workflow. However, I am getting an error: 

 "Unable to process template language expressions in action 'ComposeFormatExcelDate' inputs at line '1' and column '9734': 'The template language function 'int' was invoked with a parameter that is not valid. The value cannot be converted to the target type.'."


Can you assist?


@sumitarjandas I am getting the same error and really need some help sorting it out. I’ve tried it all!

Hello All,


I agree with the approach that @RobElliott provided.


I've done this before but using a variable (vs compose) to convert and store the Excel date. More details here: Import Excel data into an existing SharePoint List using Power Automate – Norm Young


I hope this helps.




Thanks Norm, I will digest and try