I'm having the exact same sort of issue. I'm in a slightly different time zone than my University. They make everything due at 11:59pm on the day an assignment is due.
On the browser version, I've set my time zone to match my university's, and everything displays correctly.
On the mobile version, there's no way to change this, so at a glance everything displays as if It was due the next day--making it appear as though I had an additional day, when in reality I only have 1 additional hour into the next morning. This makes it difficult to properly plan ahead and allocate time to complete assignments.
The current "solution" of "just change your phone's time zone" isn't acceptable as it's basically the same as saying "just mess up everything else on your phone to fix this one thing"