Get certified for free when you join Fabric Data Days 2026 and dive into Fabric, Power BI, SQL, AI, and other essential data skills.
Join nowJuly 7 - July 17 | Round 2 of the Power BI Dataviz World Championships. Don't miss your chance! Learn more
HI Guys
I have a column A with a short date format. I want to add a custom column to it and use the DAY excel function to return the day of each month.
What is the syntax I have looked here but when I try it nothing works I get errors all the time? Sorry I know it is probably me but trying to get my head round Power BI
Solved! Go to Solution.
sorry in your case in the "custom column formua:" box:
= each Date.Day([Date])
Hi Thorr,
i notice you would like to apply the Day function in the M language (going into editing the query).
I have a column named, "ShortDate" containing the short dates. and I have simply added a new "custom column" from the add column tab. and then applied the formula: = Table.AddColumn(#"Removed Columns", "Custom", each Date.Day([ShortDate]))
The above worked. I noticed that the formula is case sensitive.
I hope this helps.
Hi
Does not work for me I get a new column called Custom with Table in every entry
Hi @thorrrr,
We can use DAY function to return the day without any issues.
https://msdn.microsoft.com/en-us/library/ee634390.aspx
Regards,
Charlie Liao
Just get an error if i use your solution
Hi Thorrr,
try the following = each Date.Day([ShortDate])
i think i can see where you made the mistake.
sorry in your case in the "custom column formua:" box:
= each Date.Day([Date])
Join us in Barcelona for FabCon and SQLCon, the Fabric, Power BI, SQL, and AI community event. Save €200 with code FABCMTY200.
If you love stickers, then you will definitely want to check out our community sticker challenge, Barcelona edition!
Check out the July 2026 Power BI update to learn about new features.
| User | Count |
|---|---|
| 30 | |
| 23 | |
| 23 | |
| 23 | |
| 14 |
| User | Count |
|---|---|
| 48 | |
| 33 | |
| 20 | |
| 18 | |
| 16 |