Completion Date (/time)
Often, in projects ‘completion date’ is used to denote the estimated (or actual, once complete) moment for the completion of a task.
Example: When is the completion date for room 3 curtains and trimmings? - Next Wednesday around 4pm.
You can abbreviate it to ‘complete date’ if you like.
Start date, end date. Start time, end time. Target date, actual complete date, etc. Usually what each of these specifically mean is defined at the start of a project, so that everyone uses consistent language, to avoid confusion.
Note: quite a few project websites use ‘finish date’. I much prefer ‘complete date’. Because then you avoid discussions about ‘well, how finished is ‘finished’? Whereas complete alludes to the goal ‘the item is complete’ rather than the process ‘we need to finish it!’ And in order to succeed, one should be aiming for ‘completed goal’ not ‘a story about the process’.