Shouldn't "What are you doing on Tuesday" be accepted? Or am I missing something?
A what are you doing - present continous- folyamatos jelen.
What are you doing at the moment ? - Mit csinálsz most?
What do you do- present simple - egyszerű jelen
What do you do (usually) on Tuesday? - Mit csinálsz (általában) kedden?
"What are you doing on Tuesday" should certainly be accepted. Report, report.
What will you do on tuesday - seems to me more logic, but it was marked wrong.
So it is "kedd_en" because it is meant to be usually on that day and not only one tuesday? Otherwise it was simply "mit csinálsz ez kedd?"