Skip Dates - Report Module Bar Chart Domain

I’m working on a bar chart in the reporting module for a daily report that gets emailed via a schedule. The problem is, when showing a few months of data, the domain (x-axis) gets extremely crowded. The user is requesting to show 8+ months in the chart, so it’s going to be incomprehensible. Is there a way to only show every third day, or maybe only show the first of every month?

I am using 8.0.11. Thanks.