Libraries usually open from 09:00 to 21:00 or 08:30 to 20:30, Monday to Friday.

During summer, Christmas and Easter there are special opening hours that are announced in advance.

• María Zambrano Library is open every day except Christmas and the week of 15 August.
• During exams, opening hours are extended to 01:00 a.m and on peak days it is open 24 hours.
• During this period, access is restricted to the Complutense University community: it will be necessary to show the TUI UCM card, the library card or identify yourself using the UCM mobile app.