are four pieces made of versions of the formula for Mittwoch: Europa-Gruss, Nr. 72, for winds (1992/1995/2002), originally conceived as the "greeting" for Mittwoch but replaced Trumpetent, Nr. 73, for four trumpets (1995) Mittwoch-Formel, Nr. 73½, for percussion trio (2004) Klavierstück XVIII (Mittwoch-Formel), Nr. 73⅔, for synthesizer (2004) Also, there is Strahlen, Nr. 80½, for a percussionist and ten-channel sound recording (2002), fashioned from Hoch-Zeiten for choir Finally, there is: Litanei 97, Nr. 74, for choir and singing conductor (1997) which sets a text from Aus den sieben Tagen (1968), incorporating fragments of the Licht superformula. Performances Work on Licht began in 1977, and was finished in 2003, though the final scene was performed for the first time in 2004. All seven operas have been staged individually, at La Scala (Thursday, Saturday, and Monday), Covent Garden (Thursday), Leipzig Opera (Tuesday and Friday), Cologne Opera (Sunday), and Birmingham Opera Company (Wednesday, premiered on the composer's birthday, 22 August 2012). Plans had previously been made to stage Wednesday in Bonn in 2000 and in Bern in 2003, but both were canceled due to financial and technical problems. The entire cycle was broadcast in a series on SWR2 between 2001 and 2007, introduced by the composer in conversation with Reinhard Ermen. Performing such a piece is a challenge not only due to its length, but also due to the logistics involved. Each part, and in many cases, each scene, is designed for a different configuration of musicians, ranging from scenes written for a cappella choir to orchestra with synthesizer to string quartet playing from helicopters above the concert hall. In 2019 the Dutch National Opera initiated a three-day immersion into Licht that was called aus LICHT. It included portions of the Licht cycle from all seven days, totaling about 15 hours of performance time. The three days/parts were: Michael Lucifer and Eve Cooperation and the Opening Up of Space Performance dates were May 31 – June 2, June 4–6, and June 8–10. aus LICHT was a joint production of the Dutch National Opera, Holland Festival, Royal Conservatory of The Hague, and the Stockhausen Foundation for Music. World premières Donnerstag (Thursday) – 1981, at La Scala in Milan Samstag (Saturday) – May 1984, at La Scala in Milan Montag (Monday) – 1988, at La Scala in Milan Dienstag (Tuesday) – 1993, at the Leipzig Opera Freitag (Friday) – September 1996, at the Leipzig Opera