Dienstag aus Licht Dienstag aus Licht Dienstag aus Licht (Tuesday from Light) is an opera by Karlheinz Stockhausen in a greeting and two acts, with a farewell, and was the fourth of seven to be completed for the opera cycle "Licht: die sieben Tage der Woche" (Light: The Seven Days of the Week). It was begun in 1977 and completed from 1988 to 1991, to a libretto by the composer. "Dienstag" is an opera for 17 solo performers (three singers, 10 instrumentalists, 4 dancer-mimes), actors, mimes, choir, orchestra, and electronic music. Tuesday is the red day of conflict between Michael and Lucifer .
Determination of the day of the week that a year can start on, and leap years will alter the day of the week after February 29. This means that there are 14 configurations that a year can have. All the configurations can be referenced by a dominical letter, but as February 29 has no letter allocated to it a leap year has two dominical letters, one for January and February and the other (one step back in the alphabetical sequence) for March to December. For example, 2018 is a common year starting on Monday, meaning that 2018 corresponds to the 2007 calendar year and with the last