How to set up dates for tasks on the timeline
You can set the start and end dates of the project in the following ways:
Set "Gantt Start" and "Due Date" inside the Trello card. There is three representation of the taskbar on the timeline:
Hover over the task line labeled "No deadlines" in GanttChart. A placeholder will appear. Click on the desired date to start stretching the planning bar, then drag the range of dates that you needed to apply the deadlines to the task.