"What do you do the day after tomorrow?"

Translation: Mit csináltok holnapután?

[attackmole]

Would "Mit csinálsz holnapután?" also work? I read the 'you' in the sentence as singular.

[vvsey]

Yes, absolutely.

[OlgaZubkov]

Since there is no difference between the 2nd person plural and the second person singular in English, both of translations should be accepted.