HOURS OF OPERATION vary & can be found at this link: https://www.library.jhu.edu/library-hours/milton-s-eisenhower-library/
Academic Liaisons are available M-F for your research needs.
Hours of Operation can be found here: http://www.library.jhu.edu/hours.html
"The Milton S. Eisenhower Library is the Johns Hopkins University’s principal research library and the largest in a network of libraries at Johns Hopkins. The library is named for the university’s eighth president, whose vision brought together the university’s rich collection of books, journals, and other scholarly resources."