Start Date

On the Scheduling | Schedule tab, in the Tasks group: Click Start Date to set the start date for the tasks selected in the Gantt. You can also right-click on the tasks and select Adjust Start Date. Alternatively, double-click on a Start date in the Tasks List.

Note: If you drag and drop selected tasks to a new position in the Tasks list, their position in the Gantt chart is adjusted. If those tasks are linked, you will need to manually adjust the links and the start dates of those tasks.

Start time

Use the spin controls to set the day, month, year and time components of the start task start date.

OK

Click OK to accept the Start date and time and you have specified.