German phrase
Von wann bis wann dauert ~?
Meaning
When does ___ begin and when does it end?
When to use it
It asks for two dates. Use it for courses, events, or plans. The tone is polite and everyday.
Example dialogue
Von wann bis wann dauert der Kurs?
When does the course begin and when does it end?
Der Kurs dauert vom 1. Mai bis zum 30. Juni.
The course runs from May 1 to June 30.