You can have your project include weekends in the schedule by setting your Project's calendar to a calendar that includes weekends such as the "24-Hours" calendar. Please use the following steps:

1. Open the "Project Properties" dialog by clicking  "Properties" in the "Project" menu of the Gantter editor

2. Set the "Calendar" field to "24-Hours"

3. Click the "Save" button on the bottom-right of the "Project Properties" dialog.

Calendars can be assigned to the project, tasks and resources. Some calendars, by default, have every day as a working day such as the "24-Hours" calendar. Other calendars such "Standard" have Monday-Friday as working days and Saturday and Sunday as non-working days.

Please see the help video which demonstrate how to set Working days to Non-Working days and Non-Working days to working days for a calendar.

Rather than setting for each particular day as shown in the videos, you can also set for everyday by choosing the appropriate setting from the drop-down labelled "Working time setup" such as "All Sundays by default".

4. Add working hours by typing in "9:00 AM" in the "From" column and "5:00 PM" in the "To" column.