Access Pivot Chart: how to show week increments across top of bar chart

I'm trying to create a pivot chart that is similar to a gantt chart in some ways. The Bar Chart format is what I'm using. In the 'column' on the left, going down in a list, are Task descriptions. Each task is a record that has a beginning and ending date. I need on the horizontal top of the chart to show weekly markers, the date changing depending on the current date (meaning each marker is a week out, in ongoing sequence from todays date). How do you set that up?

That's just for the header of the chart. Then I need the 'bar' for each task (record) to reflect its beginning date and ending date. Meaning the bar starts under the column of the header date the begin date corresponds with. And the bar ends under the column of the header date the Ending Date corresponds with.

I don't have a lot of experience with Pivot Charts so any advice would be greatly appreciated.