24 Hours Calendar – how it works in MS PROJECT 2013


I have a lot of questions about MS PROJECT 2013 Calendars, especially about 24 hours Calendar.

I will explain how does it work in MS PROJECT 2013.

First I will Create a very Simple Project with only one Task and only one Resource:




I will assign Mary to Task:


Now let’s Look to Task Usage View:


As you can see Mary will work on the Task from Monday till Friday 8 hours per day, because of this:






So 5 days Duration means 5 days * 8 hours per day = 40 hours. Or Magic formula:

Work = Duration * Units ==>> Work = 5 days (5 days * 8 hours per day) * 100% Units for Mary = 40 Hours

Now I will say that Mary will work on 24 Hours Calendar:


If I now look at the Task Usage View, I’ll get:


As you can see Mary will work 16 hours at Monday (From 08:00 am till 00:00 = 16 hours), and 24 hours  on Tuesday (From 00:00 till 00:00), and that makes in total 16+24 = 40 hours, sop she will finish in two Days.

You should be careful when you are working with that Calendar. Ask yourself this: “Is it really possible that someone will work 24 hours per day?” I don’t think so. So when you can use this Calendar? From my point of View when you are using Machine (Automatic work), and not a human, because Machine can work 24 hours per day.



About Nenad Trajkovski

Location: Zagreb, Croatia Occupation: Project Manager Interests: Project Management and MS PROJECT He was born in Zagreb, Croatia at 1963. After completing his college he started working on projects in different business areas (banking, manufacturing, automotive industry, distribution, oil companies, etc.) developing and implementing ERP systems into different companies. He has got a lot of experience working with people in different business processes and also possesses great knowledge in information technologies and financial services. Today he works as a business consultant, adn Project Manager in PERPETUUM MOBILE d.o.o. Zagreb. He is a regular lecturer for Project Management in MS Innovation Center in Varaždin, Logosoft Sarajevo in Bosnia and Herzegovina and SEAVUS GROUP in Skopje Macedonia. He was named the best lecturer of WINDAYS 2008 while his lecture was also voted as the best. In addition, he was in TOP 10 lecturers at the MS SINERGY 2009 and MS VISIA 2009, 2010. Shares first place as the best lecturer of KulenDays 2009 and 2010 and PMI Conference 2009 in Zagreb. He is also a regular lecturer in the MS Community. He is a Certified Accountant and a PMP (Project Manager Professional) and a PMI-RMP (Risk Manager Professional), MCP, MCT, and Microsoft Certified Technical Specialist - Microsoft Project 2010. From 01.01.2012 awarded with MVP (Microsoft Most Valuable Proffesional - Microsoft Project)!
This entry was posted in MICROSOFT PROJECT, Microsoft PRoject 2010, Microsoft Project 2013, MS PROJECT 2010, PMI, PRoject Management and tagged , , , . Bookmark the permalink.

1 Response to 24 Hours Calendar – how it works in MS PROJECT 2013

  1. isfan says:

    Thanks buddy, you have a wonderful talent to explain to a newbie like myself.
    I wish you will create a YouTube site with tutorials on similar and ,many more topics.

    Thanks again

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