WorldCat Scheduled Downtime

"On Sunday, February 27 there will be a scheduled service downtime for a number of OCLC services from 1:00 am until at least 6:00 am and, at most, 11:00 am (U.S. Eastern Time). We apologize for any inconvenience this causes. [OCLC] need[s] to take the following services off-line in order to upgrade the storage systems and capacity for all OCLC services."  Among the services affected will be the WorldCat database.