Let's take an example here and move forward to find all the calendar days for all the activities, for the Early Start. So here are the Early Dates, early start and early finish. I put all for you, the early start date as Working Days as we found it from the forward and the backward task calculation. The same I put for the early finish dates, I highlighted the calendar dates because we want to work on it together. The same applies to the Late Dates, from the backward pass calculations. The late start and the late finish for each of the activities from a working day point of a view, late start and the late finish here. So, I want you to put the following calendar on a piece of paper, as well as the project here so as we can relate and work together on finding all the calendar dates for all these working dates for the activities. So in this case we have the early start, and whenever we mention an early start in the calendar, we identify that December 22nd as the first working day. So that's the day i'm going to start with Activity A. And the way I did it is 0 plus 1, the rule of shifting one which will be 1. The working day 1, when you go to that calendar, it is under December 22. For B, the working days is two as the early start date. 2 plus 1, because it's an early start or starting dates would be 3. And the workday day number 3 on that calendar in the previous slide is December 24, so that says that activity B, the early start date for it, it will be on December 24. And the same applies for activity C, it is the same working days so is going to be the same answer. For activity D here the early start is work day number 5 so 5 plus 1 equal 6, the work day number 6 is December 30th. And the last activity in the project working day number 10. In the calendar it show's January 6 as the calendar I'm sorry, 10 plus 2, 11, the workday number 11 is January 7th on the calendar from the previous slide. However, for the early finish dates, we mentioned that rule of adding one will not apply. In this case the working day 2 for the early finish of Activity A, we go to the calendar and the working day number 2 is going to be on December 23rd without adding any one. The same for activity B, working day 5, work day number 5 on the calendar is December 29. And for C that early finish date would be, as working day number 6, will be December 30th on the calendar. As a calendar date, then it will be December 30. Activity D over here will be work day number 10 which will be January 6 in this case. And the last one is Activity E with an early finish date of the work day number 12, WD12 then the calendar is January 8, Friday. So that would be the calendar date of the early finish date for the last activity. So with that being said, I would love for you to try, before we show you the answers, to figure out, what's the latest start dates on calendar dates for all the activities. And the late finish dates on the calendar dates for all the activities. So let's solve them quickly here. Again, the rule applies for the late start. Whenever it's a starting time between either early start or a late start, you take the working days here, you add 1 to it. And that working day number, for example 0 plus 1 equals 1, you look at the calendar and you find what's that on your calendar that we show in the previous slide. So in this case, for 0 is going to be the same as here, December 22nd. For the number two is going to be the same, the 24th because they are critical activities. C is not a critical activity, so it has a work day late start of working day number 6, 6 plus 1, 7. The work day number 7 is December 31st. And for activity D and E, they are critical activities the late starts similar to the early start so they going to be the same as December 30th and January 7th. As for the late finish date, similar to what we did in the early finish dates, there is no adding to one to the working date, so we just look at the number. Two, for example, has the late finish for activity A, and we match it for the W D 2, working date number 2, on the calendar. So it is also similar to the critical activities here A, B, D, E, so we have December 23rd, and we have December 29. As for C, it's not a critical activity, so it's not the same of the early finish of it. So 10 plus, and we don't have any plus here, we have the work day 10, which January 6 in this case. As the calendar date for the late finish day for Activity C. And then we have Activity B and E as 10 and 12, also January 6, and January 8. With that, we have the link between a work or working days versus calendar dates. And as I explained, you have to understand the differences from the beginning of the project, even either if you are working with a general contractor or a subcontractor or clients. Every one of them have their own calendar dates and holidays. Some geographical locations, they have also different holidays from others. If you are still working remotely as a designer or working from an administration view with other projects overseas, you have to understand the holidays and the weekends in that country there. And that's important, so as we do not show any conflict along the way when the project starts. With that we will wrap up our module today, thank you.