I followed your link, saw that 'fino a' equals 'up to' but was still marked wrong hmmm
In English we would say "until" or "up until" with a day of the week. We can say "Count up to ten" or "Count to ten".
I've heard "FINO A" is used before nouns and unconjugated verbs, and FINCHÈ is used before conjugated verbs
I didn't hear it that way. The recording must have changed by the time I did the exercise, but I think "sino a" can be a synonym for "fino a". Hopefully a native speaker can explain any difference in usage.
I think, Up to Wednesday should also be accepted. We will have to work each night until 11 PM up to Wednesday.
Finche before a conjugated verb (but not an infinitive) fino a before all else. See links above.
Could this be said in goodbyes? As in "until (we meet again) wednesday?
That's normally just A mercoledì!. You might seem a bit odd adding fino.