This page describes a server event.
The Long Grey was a time when the server went down completely, and no one was able to contact Morgoth, or connect to the server. The exact reason the server went down is because there were few admins able to run the server at the time, and Morgoth was unable to monitor the console in case of crashes, players needing assistance, etc. This time lasted roughly from October 10th, 2017, to April 8th, 2018. On April 8th, the server officially came back up, but the server was announced to come back about a month before. The exact time was unclear then, but ended up being much longer than any anticipated. The confirmed return was on April 7th, and the files of the server were being restored from then to the 8th.