Please note: during evening and weekend hours, access the HKS Library through the Littauer courtyard entrance. Patrons without a Harvard ID will need to sign in at the security desk with photo ID. The building is restricted to Harvard ID holders after 11pm.
Extended Hours are available only during the regular Fall and Spring terms, Sunday through Thursday, 11:00 p.m. - 1:00 a.m. The library itself is available for use as study space, however, the Circulation Desk and all other library services are closed during extended hours.