Join us at FabCon Atlanta from March 16 - 20, 2026, for the ultimate Fabric, Power BI, AI and SQL community-led event. Save $200 with code FABCOMM.
Register now!Vote for your favorite vizzies from the Power BI Dataviz World Championship submissions. Vote now!
Hello!
I am having some issues with converting a column formatted as a whole number into a date format.
I have a column named "myDate", formatted as a whole number with zero decimal points.
I can't simply change the data type to "Date" so I'm trying to create a whole new column using the DAX date function.
I'm using this function:
NewDate = DATE(LEFT(Table[myDate];4);LEFT(RIGHT(Table[myDate];4);2);RIGHT(Table[myDate];2))
and it throws me this error:
An argument of function DATE has the wrong data type or the result is too large or too small (translated from swedish)
however, if I use the same function but replace the last argument (day) with a number it seems to work, allthough this obviously won't give me my desired result.
I manually created a similar CSV-file and loaded it into Power BI with the column formatted as a whole number with the exact same name (as far as I can tell) just to see if it would generate the same error but to my surprise it actually worked......
I also tried the same function on another column in my original table (also date, but formatted as a whole number) and it worked there too..
And the same function in Excel works perfectly fine..
What could be the issue with the data from my original column (Table[myDate])? I'm running out of ideas and any help would be greatly appreciated. Please note that I'm a newbie when it comes to Power BI.
Much appreciated,
Robert.
Use the query editor, make sure that your myDate field is formatted as text, and add a custom column with the following statement:
=Date.FromText([myDate])
Your end result should look like this:
Vote for your favorite vizzies from the Power BI World Championship submissions!
If you love stickers, then you will definitely want to check out our Community Sticker Challenge!
Check out the January 2026 Power BI update to learn about new features.
| User | Count |
|---|---|
| 55 | |
| 52 | |
| 41 | |
| 16 | |
| 16 |
| User | Count |
|---|---|
| 108 | |
| 106 | |
| 39 | |
| 33 | |
| 25 |