Can Weekly Summary on expense report be configured start on a day other than Sunday?

We have staff who travel to weekend conferences so, for example, their travel will start on Friday and end on Tuesday. When viewing the weekly summary for this travel, the first week's summary loads but a loading error occurs since the expenses are split into two weeks (both starting on Sunday). I'm wondering if it's possible for the first day of the week to be changed from Sunday? In the example I used, if the week could start on Wednesday, then the entire weekend's travel could be captured in the weekly summary.