How to edit Project calendar in Microsoft Project

By default when we create a new project in Microsoft Project it use 5 day work week. How about we want to use 6 day work week.

I will show you how to do it.

We have a simple project using default 5 days work week.


We can see a task with 10 days duration start on 16-Sep and finish on 29-Sep.

Now we will change Project calendar from 5 days work-week to 6 days work-week.

Go to menu Project -> Change Working Time


Click on Work Weeks tab and Detail button.


Click on Saturday, Select “Set days to these specific working times”, Enter the working time.


Click OK.

Now we can see Saturday is working day.


We can add National Holiday by click on Exceptions tab. Enter holiday name, Start, Finish date of holiday.


Now from 5-Feb-17 until 11-Feb-17 is non-working day.

After finish everything we click OK. Now our project use 6 days work-week. And we can see the task now finish earlier on 27-Sep.



2 thoughts on “How to edit Project calendar in Microsoft Project

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  1. Hello, The approach you outlined is OK but I would suggest an alternative approach. When using Microsoft Project, one aspect of troubleshooting is to ensure you can always use the default out of the box settings. Instead of modifying the default “Standard” Project Calendar, I would suggest creating a new Calendar called “6 day workweek Calendar” and then applying that to the project. In addition, you should consider changing your definition of a work week to 48h instead of 40h as per the default, otherwise when you enter 1w as a task duration t will still default to 40h (5d) !! One last suggestion – if you want to be able to use these new settings and calendar for any new projects you create going forward save the plan as a template. Then all you do is use that template as the basis of a new project, and you won’t have to setup another calendar or change the workweek as these changes are already defined in the template project ! 🙂 If you plan to use Project Server or Project Online the approach is different again, but contact me for advice in this area. I should add, for the benefit of clarity and disclosure, that I work for a company that specialises in this area and I have been a Microsoft Project Consultant for the last 26 years !!


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