The easier way to create a visual for a calendar will be to download some paid/free visuals that I can find in the market. In this article, I will show you how to do it without any additional tools.

First, I have created this 2025 calendar table:

NOTE: to know how to, read Power BI: create an automatically updated calendar

Next, I will add 7 new columns by clicking on “table tools -> new column”:

Delete everything then put:

• For the first one: daynumber = DAY([calendar])
  
• For the second one: dayname = FORMAT([calendar],"DDD")
  
• For the third one: weekdaynum = WEEKDAY([calendar],2)
  NOTE: the “2” means that my calendar will start with Monday
• For the fourth one:

weekmonth = var startmonth = DATE(YEAR([calendar]),MONTH([calendar]),1)
var endmonth = EOMONTH([calendar],0)
var newcalendar = ADDCOLUMNS(CALENDAR(startmonth,endmonth),"week",WEEKDAY([Date],2))
// NOTE: the “2” means that my calendar will start with Monday
return
COUNTROWS(FILTER(newcalendar,[Date]<[calendar] && [week]=7))+1
                

• For the fifth one: weekyear = WEEKNUM([calendar],2)
  NOTE: the “2” means that my calendar will start with Monday
• For the sixth one: monthname = FORMAT([calendar],"MMMM")
  
• For the last one: monthnum = MONTH([calendar])
  

NOTE: if you want your calendar to start with another day, for instance Sunday, change the 3 “2” by “1”, all 3 should have the same number. For more options, read:

• Microsoft WEEKDAY webpage
• Microsoft WEEKNUM webpage

Before to create my visual, I will need to sort correctly those columns by clicking on “column tools -> sort by column”:

• The day name to select “weekdaynum”
  
• The month name to select “monthnum”
  

In the “visualizations” panel, I will choose “matrix” then those columns in those fields:

For “values”, click on the “down arrow” to select “minimum”:

The visual will look like this:

To remove both “totals”, click on “format your visual” then turn off those options:

I will create a slicer with “monthname”:

And in the “slicer settings”, I will choose this option:

This is the result:

In my calendar, I can add some information, for instance, I have another table like that:

NOTE: there is an active relationship between my 2 tables

I am going to add “comment” in “values”:

In “format my visual”, I will configure those 3 options:

My visual will look like this:

I will reduce the size of the “weekyear” column to get this result (just place the mouse above the vertical blue line, the mouse icon will change then left click and hold to move it to the right):

Also I can put some colors, put the values in the center, etc. to get for instance this final result:

Just play with the different configurations to customize it as you like.