Hello,
On my schedule, I am using the standard calendar for everything, but for only some of the activities I must use a calendar that will go through weekend and 24 hours.

So first I entered the tasks using normal calendar, not doing anything special.

Now the schedule knows that the amount of work for a 2 day tasks I say there is 16 hours correct?

Only then, when I adjust the calendar to a 24 hour calendar, it will reduce the duration to 1 day?

And I saw that there is a readily available 24 hour calendar, but I need a 24 hour AND weekend calendar together so I must create a new one and assign that one to these tasks right?

So is my logic correct when I said I first enter them using normal calendar so project knows that normall it is a 2 day task?

And how do I assign some of the tasks to the calendar - I open the advanced view of EACH of those activities one by one and assign my 7/24 calendar to them?