Show timesheet date in separate column on invoice

Currently, if you choose to show the "timesheet date" in the item description, it appears under under the "task and description" column. However, this ends up putting multiple types of data in the same column. The date should be in its own column.

I do not see an option under Templates>Item Table>For Invoices created from Projects to add a column for timesheet date (which, on the invoice, should be called "date").