German phrase
In welcher Zeitzone gilt die Frist ~?
Meaning
Which time zone applies to the deadline ___?
When to use it
It asks which zone applies. Use it when deadlines follow different local times.
Example dialogue
In welcher Zeitzone gilt die Frist für das Stipendium?
Which time zone applies to the scholarship deadline?
Die Frist gilt nach der Ortszeit der Universität.
The deadline is based on the university's local time.