All Library of Congress systems will be taken offline beginning Friday evening. This includes ID.LOC.GOV, and the listserv.
The Library of Congress has planned extensive electrical work and power maintenance for this coming weekend. As a protective measure, all Library systems will be powered down. The maintenance period is scheduled for completion by Tuesday morning, when it is expected all Library systems will have been restored to normal operation. Though it is anticipated work will not be fully completed until late Monday (or very early Tuesday morning), services will be start coming back online many hours before then.
We regret any inconvenience this may cause.
Network Development and MARC Standards Office
Library of Congress