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Hours of Operation

The Thomas Jefferson Building and exhibition galleries are open to visitors Monday through Saturday from 8:30 a.m. to 4:30 p.m.. Hours for researchers vary. View Reading Room and Research Center Hours.

All buildings are closed to the public on Sundays, Thanksgiving Day, Christmas and New Year's holidays. The Madison and Adams buildings are closed on all federal holidays.

In the event of inclement weather or other issues, the Library of Congress typically follows the Federal Government operating status.

More specific hours for building access is available below.

Thomas Jefferson Building

First Street, SE, Entrances for All

Daytime Hours

Monday - Saturday
8:30 a.m. – 5:00 p.m.*

*Researchers and Staff only after 4:30 p.m. Exit available until 5:30 p.m.

Second Street, SE, Entrance for Researchers

Evening Hours

Monday, Wednesday, Thursday
5:00 p.m. – 9:30 p.m. (Entry reserved for researchers and staff.)

CLOSED 8:30 a.m. – 5:00 p.m. Monday through Saturday, and all holidays.

Second Street, NE, Exit

Monday, Wednesday, Thursday
5:30 p.m. – 9:30 p.m.

CLOSED 8:30 a.m .– 5:30 p.m. Monday through Saturday, and all holidays.

James Madison Memorial Building

Independence Avenue, SE Entrance

Monday–Friday
8:30 a.m. – 9:30 p.m.
Entry after 6 p.m. is reserved for researchers entering reading rooms that are open in the evenings (for Reading Room hours), for staff, and those attending special programs.

Saturday
8:30 a.m. – 5:00 p.m.

C Street, SE

Monday–Friday
8:30 a.m. – 2:00 p.m. for entrance
8:30 a.m. – 9:30 p.m. for exit

Closed on Saturday

John Adams Building

Second Street, SE

Monday, Wednesday, Thursday
8:30 a.m. – 9:30 p.m.
Entry after 6 p.m. is reserved for researchers entering reading rooms that are open in the evenings (for Reading Room hours), for staff, and those attending special programs.

Tuesday, Friday, Saturday
8:30 a.m. – 5:00 p.m.

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