German phrase
Bis spätestens ~.
Meaning
By ___ at the latest
When to use it
It sets a final deadline. Common for meetings and handoffs; it stresses punctuality.
Example dialogue
Bis spätestens 18 Uhr.
By 6 p.m. at the latest.
Kein Problem, ich bin pünktlich.
No problem, I'll be on time.