Moving linked tasks apart and starting on nonworking time
The task you're moving was scheduled to start only after another task finishes. At some earlier time, a task dependency was created between these two tasks so that this task could not begin until the other task had been completed. By moving the task, you will remove this dependency.
In addition, you're moving the task so that it starts on a nonworking day. If you begin or end a task on a nonworking day, Microsoft Project cannot schedule any work to be done on that task during that day. The task will not actually start until at least the next working day. In the Gantt Chart view, nonworking time is indicated by gray vertical bars by default.
If this task is no longer dependent on the other task's finish, you can remove the link and move the task with the Planning Wizard.
Note: Go to Link tasks in a project and Set the general working days and times for a project for additional information.
Using the Planning Wizard, you can:
Remove the link and move the task to start on the next available working day.
Project will move this task to the next available working day after the date you specified and break the link to the predecessor task. The start date of the moved task will no longer be driven by the finish date of the other task.
Keep the link and move the task to start on the next available working day.
Project will move this task to the next available working day after the date you specified, but keep it linked to the other task. Project will continue to automatically adjust the start and finish dates of the moved task to reflect changes in the finish date of the predecessor task.
If the task must begin on the date you specified, you can make that day a working day and then move the task to that day.
If you don't want the Planning Wizard to display this information again, select the Don't tell me about this again check box.