DayOfWeek type
Definiert Werte für DayOfWeek. Mögliche Werte sind: "Sonntag", "Montag", "Dienstag", "Mittwoch", "Donnerstag", "Freitag", "Samstag"
type DayOfWeek =
| "Sunday"
| "Monday"
| "Tuesday"
| "Wednesday"
| "Thursday"
| "Friday"
| "Saturday"