This site provides Highlights released in the past.

July 12, 2010   Suspension of Service upon Revising the Certificates(Completed) TimeStamp Service down time : July 20, 2010, 12:30 to 12:55 p.m. (JST) Attention: New root certificate and intermediate certificate will be required when you verify the TimeStamp token after the certificates are revised. July 9, 2009   Service temporary stop due to further improvement of reliability(Completed) TimeStamp Service down time: July 23, 2009, 10:00 to 10:05 a.m. and 14:00 to 14:05 p.m. about one or two minutes. (JST) January 20, 2009   Service temporary stop due to further improvement of reliability(Completed) TimeStamp Service down time: January 29, 2009, 5:00 a.m. to 6:00 a.m. about one or two minutes. (JST) January 2, 2009   APOLOGY for delay of resumption December 12, 2008   Service temporary stop due to insertion of leap seconds and further improvement of reliability(Completed) TimeStamp Service down time : January 1, 2009, 5:00 a.m. to 11:00 p.m.(JST)