Updated on Oct. 12 at 7:00 a.m.: The performance opened on the night of Oct. 11 with Kim Jong Un in attendance. 

North Korea’s new “grand mass gymnastics and artistic performance” propaganda event was scheduled to kick off on Monday, Oct. 12 and run through the end of the month, state media reported on Friday evening. The show actually opened on Sunday night, however, with Kim Jong Un attending.

Known informally as the mass games, this year’s event is designed to coincide with the 75th founding anniversary of the Workers’ Party of Korea (WPK), according to the state-run outlet Arirang