Wait until we're ready - Please finish by 5 p.m.
When we refer to time, we can use by to say something will happen at or before a point in time.
We use until to say something will continue up to a point in time/event:
We can also use until with negative verbs to say something will only begin after a specific point in time/event:
|Explanation of how 'até' translates to 'by' or 'until'.||SmallAdvantages|
|The difference between 'by' and 'until' when talking about time.||BBC Learning|