'the day is done' vs 'the day is accumulated'

[Nimas]

Business English Lesson, Advanced Level

ESL/EFL Test #132 "Conference Advice", question 6

The importance of conferences is not the seminars or workshops, but the refreshment breaks and chatting at the bar after the day is ..........

(a) accumulated
(b) cancelled
(c) discussed
(d) done

Business English Lesson, Advanced Level

ESL/EFL Test #132 "Conference Advice", answer 6

The importance of conferences is not the seminars or workshops, but the refreshment breaks and chatting at the bar after the day is done.

Correct answer: (d) done

Your answer was: incorrect
The importance of conferences is not the seminars or workshops, but the refreshment breaks and chatting at the bar after the day is accumulated.
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why not accmulated?

Nimas

[Mister Micawber]

.
A day cannot 'accumulate'.
.
_________________
Native English teacher at Mister Micawber's

[K1ngk0ng]

So what does "the day is done" mean, please? Sorry it was posted long ago, however I found it while searching for the meaning of it in the forum.

Thanks

[Mister Micawber]

After the day is done = at the end of the day.
_________________
Native English teacher at Mister Micawber's