Can we make a calendar using Pivot Tables?!?
Of course we can. Today let us learn a simple technique to create calendar style reports using Pivot tables.
Thanks to Rob for inspiration
Before making any progress, let me thank Rob from PowerPivotPro for the inspiration. Recently he wrote an article explaining how to use PowerPivot & DAX formulas to create calendar charts in Excel. I applied similar technique to Pivot tables.
Demo of Pivot Calendar
See a quick demo of pivot calendar chart before learning how to do this.
Creating a Pivot Table Calendar
Step 1: Set up an entire year of dates in a list
Lets assume, we want to make the calendar for year 2012. So write that in a cell (G3). Now, in a range of 366 cells, generate all the dates for the year (2012) using simple formulas.
- First date will be =DATE(G3,1,1)
- Next 365 dates will be previous date + 1
Step 2: Calculate Day, Month, Year and Weekday
Using DAY(), MONTH(), YEAR(), WEEKDAY() calculate the day, month, year and weekday for each of the 366 days.
Step 3: Determine the week number in a month
Now comes the tricky part. We need to find out which row each date should be displayed. First take a look at this illustration.
The logic for calculating row numbers is very simple:
- First day of a month is always in row number 1.
- If a day is not Sunday, we just use previous row number
- On Sundays, we just increment the previous row number and use it.
All of this can be expressed in a simple IF formula =IF(D7=D6,IF(F7=1,G6+1,G6),1)
- D7 contains this month, D6 is previous day’s month
- F7 contains weekday, will be 1 for Sunday and 7 for Saturday
- G6 contains previous row number (weeknum)
Step 4: Dealing with Leap years
So far we are good, except for a minor glitch. Certain years have 366 days (for example 2012) while others dont. That means, depending the year, we need to either use 365 rows or 366 rows of our data while generating the pivot report. To do this, we create a named range tblDates that refers to below formula:
=IF(Calcs!$D$3,Calcs!$B$5:$G$371,Calcs!$B$5:$G$370)
Note: D3 is TRUE when an year is leap year.
Step 5: Create pivot table that shows calendar
Now, we need to create a pivot table from the range tblDates.
Set up your pivot table like this:
Step 6: Add a slicer
To enable users to select a particular month interactively, just add a slicer on months. For this,
- Select any cell in the pivot table and go to Options Ribbon > Insert Slicer
- Select Month as field to insert a slicer.
- Adjust slicer properties to show items in 6 columns (Slicer Options Ribbon > Columns)
- Done!
At this point, you can interactively select a month & see the corresponding calendar.
Related: More examples on Slicers
Further Enhancements
Now that the basic Pivot Calendar is ready, try these ideas:
- Use a spin button / slider control to interactively adjust the year. Remember, when you do this, you need to refresh the pivot table in background using a simple macro.
- Adjust week start to Monday: Likewise, you can modify your formulas to adjust weekstart to Monday or any other day you fancy.
Using Pivot Calendar as a Chart
Of course, having a mere pivot calendar is not much fun. But you can apply this idea to create a calendar chart. See this:
Calendar Chart Demo:
How to create this Calendar chart?
To keep things simple, lets understand how to create this chart with just one metric – Employee productivity.
- Once the pivot calendar is ready, we add extra rows between each line in the calendar.
- Now, lets say, we have our employee productivity details listed by date in a table.
- Then, using lookup formulas, we fetch productivity for each day in the cell below.
- Once all the values are fetched, just select all these cells and add conditional formatting > color scale to them.
- Format the color scale settings so that you get desired colors.
- And you are done!
More on Conditional Formatting
Video Explaining Pivot Calendar & Chart
Like this concept? Watch below video to understand how the whole thing is made.
[watch this video on our youtube channel]
Download Pivot Calendar Template
Click here to download pivot calendar & calendar chart templates. Play with them. Plug your own values and see what happens.
PS: You need Excel 2010 to view this file. Please enable macros to get full effect.
Do you like Pivot Calendar Idea?
I am very excited to try this out in a client project sometime soon. I think a set up like this can be used when analyzing monthly data like employee attendance, vacations, productivity, shipments, meeting schedules, project milestones etc. Since such data is represented in calendar format in real life, your audience would find calendar metaphor easy to understand. That said, any data like KPI trends, sales, visits, calls etc. should always be represented as a line /bar charts rather than calendar charts.This way, we can spot trends quickly and understand data better.
What about you? Do you like this idea? Are you planning to use a pivot calendar / calendar chart sometime in future? Please share your thoughts using comments.
Calendars & Similar ideas:
Please go thru below links to learn more about calendars & visualizing data:
13 Responses to “Gantt Box Chart Tutorial & Template – Download and Try today”
Hi Chandoo
As one of your students I have followed your detailed example through with great success. However, Excel is acting in an unexpected way and I wonder if you could take a look?
http://cid-95d070c79aef808e.office.live.com/self.aspx/.Public/Gantt%20Box%20Chart.xlsm
On my version, I have to type 40239 (Which equates to 2 Mar 2010) to get the chart to display 31 May 2010 (which should be 40329)!!??
Have I done something wrong or is Excel acting up?
Thx
Oli
PS Your example file in 2007 displays correctly.
Hi,
I like this idea a lot, but I agree the name is a little drab.
As an American I may just be seeing things, but to me the combination of lines and bars on your chart looks like a bunch of cricket bats.
Maybe you could work that into a catchier name. 🙂
Cheers!
Here is some code I use to keep the axis synched.
It may be useful to some of your readers
It is based on a comment I saw on Daily Dose of Excel.
Function SynchGanttAxis(Cname, lower, upper)
'Sets the X min and X max for Category axis
Application.Volatile
On Error Resume Next
'
'Top Horizontal Axis
With ActiveSheet.Shapes(Cname).Chart.Axes(xlCategory, 1)
.MinimumScale = lower
.MaximumScale = upper
End With
'Bottom Horizontal Axis
With ActiveSheet.Shapes(Cname).Chart.Axes(xlValue, 2)
.MinimumScale = lower
.MaximumScale = upper
End With
End Function
Function SynchVerticalAxis(Cname, lower, upper)
Application.Volatile
On Error Resume Next
' Excel 2007 only
'Right hand vertical axis
With ActiveSheet.Shapes(Cname).Chart.Axes(xlValue, 1)
.MinimumScale = 0
.MaximumScale = upper
End With
End Function
@Oli.. Can you check your file again.. I see 40329...
@Dave: Even I saw things.. the bars actually looked like lollipops. How about calling this lollipop chart - now that would be yummy and goes along the tradition of naming charts after eatables (bar, pie, donut...)
@Bob: Superb stuff... thanks for sharing 🙂
Hi Chandoo
This looks really good and I think it can also be applied to show project phases / milestones.
Question: Thinking further could this be amended to display a project lifecycle (Idea through to Implementation say 7 phases) on one bar / row? Just imagine 20 projects within a programme all on one chart one bar each showing their respective lifecycle stages i.e. on one page.
Idea: As the Gantt Box Chart this is quite intensive to set up re formatting etc how about the added extra of once you have completed this to "Save as template" i.e. saves the formatting and layout of the chart as a template so you can apply to future charts. Simple to do and will save the time formatting etc again and again and again.
Therefore tip: Click on your chart demo and then click on Save As template icon (2007) - edit file name and click on save. Ready to use / apply via Templates in Change Chart Type window.
Thanks and be very interested if the lifecycle question can be resolved
Mike
How embarrassing.
I was obviously suffering from numerical dyslexia. I was one of those days.
@Mike H: You can easily make this chart to work like a generic project lifecycle plan chart. All you have to do is,
1. in a separate sheet define the steps of lifecycle and various dates in a table (with 5 columns for each of the projects you have).
2. now use a control cell to input the project name you want to show in the chart
3. based on the input, use OFFSET Formulas to get the correct data
4. Rest is same as the tutorial above
For more info on the dynamic charting visit http://chandoo.org/wp/tag/dynamic-charts/ and http://chandoo.org/wp?s=OFFSET
Your solution is really smart but in the en Excel isn't meant to do stuff like this. I, as a former PM, always thought is was frustrating that you had to do stuff like this for something simple like a Gantt chart. So I built Tom's Planner. And would like to plug it here. I think it really solves the problem you are trying to solve in the most efficient way. Check out http://www.tomsplanner.com for a free account or play around with the demo.
Hi there,
Chandoo - this is really a very nice and helpfull chart - I adopted it, so I can report a forecast or the delay of a certain task (coming from my role as an auditor for projects).
One topic I´m currently struggeling with: I do have a project lasting for lets say 12 month. For a management reporting, I want to have kind of snapshot, lets say one month back and 2 month in the future. I tried with the offset formula, but failed. Any idea?
Thx
Lopi
[...] Ein viel geliebter Klassiker ist die Erstellung von GANTT-Diagrammen mit Excel. Wir hatten das Thema wiederholt schon hier. Chandoo.org hat sich mal wieder mit einer neuen Variante hervorgetan: Das GANTT-Box-Chart. [...]
[...] [...]
Hi Chandoo - fantastic xls. One thing I can't figure out how to do is adjust the alignment of the vertical axis. I would like to left align so that I could indent to represent sub tasks. Can that be done? Or is there a better way?
I've been trying to work out if there's a way to show weekends on the graph. The closest thing I've got is to add them on a secondary axis, but then I haven't been able to keep both axis lined up together! Any ideas?
Following on from this - is it possible to show things like holidays?