Board Thread:General Discussion/@comment-5138166-20180817184215/@comment-32271305-20180822170720

From the maintenance announcement: "The current Summon Events will be unavailable during 8/22 (Wed) 18:00 ~ 8/23 (Thu) 01:00 PST due to preparations for the Renewal of Summon Animation that will be applied to the game during the maintenance."

Basically one hour after the maintenance is over.