Try this:
- Put the phone/device in Airplane Mode to turn off your internet / mobile connections.
- Turn off Auto date/time. Change the date to the missed date.
- Open the Kindle app. Read a few minutes, close the book (leave the app open).
- Turn auto date/time back on.
- Turn off Airplane Mode.
- Sync the Kindle app.
- Wait until the amazon servers update. (Do not read during the hours of Midnight and 3AM Eastern, won’t update).