Why aren Interlibrary Loan materials checked out for the standard three weeks?
Due dates are provided by the owning library (and we subtract a few days to allow time for the book to be mailed back). Every library makes its own choices about how long to check out Interlibrary Loan materials, so the due dates vary; some materials go out for more than three weeks, some for less. Make the most of your time by picking up your materials as soon as you can. Interlibrary Loan materials are not renewable.