I have sevaral activities using 24 hour calendar. The first activity must start friday afternoon and starting that point it is a 24 hour calendar job (befor ethis it is normal calendar). Because the whole 24 calendar portion will last only 3 days, over a long weekend, it must start on friday afternoon and finish Tuesday morning. (from 8/29 afternoon to 9/2 early morning)

First of all is it possible to show that it starts 8/29 afternoon? and then the first tasks finish saturday afternoon and finish monday morning... then next set of tasks will take another 24 hours. so i must be able to divide the units to hours for that portion I guess, but the rest of the schedule before is in days units as usual. so is this possible?