German phrase
Ich bitte um Rückmeldung bis zum ~.
Meaning
I would appreciate your response by ___
When to use it
It politely requests a reply. It can set a firm deadline in business contexts.
Example dialogue
Ich bitte um Rückmeldung bis zum nächsten Dienstag um 12 Uhr.
I would appreciate your response by next Tuesday at noon.
Das ist knapp, aber ich versuche, bis dahin zu antworten.
That is a tight deadline, but I will try to reply by then.