Step 1:

Create a Dates Table

Step 2:

Join the dates table with your data on [Start Date] <= [Date] and [End Date] >= [Date]

Step 3:

Drag [dates] to the column shelf

Step 4:

Drag [Event] to the row shelf

Step 5:

Choose Gantt Bar as the chart type

Step 6:

Use this calculation for size. DATEDIFF(‘day’, [Start Date], [End Date])

Step 7:

Finalize your view by making [Dates] continuous, dragging [Size] to size and adding color