"ʻO ka Pōʻakahi ka lā ʻapōpō."

Translation: Tomorrow is Monday.

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DAY

(possible question) ʻO ka Pōʻakahi kēia? = Is today Monday?

(possible answer) ʻAʻole, (ʻo ka) Pōʻakahi ka lā ʻapōpō. = No, tomorrow is Monday.

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(possible question) ʻO ka pōʻahia ka lā ʻapōpō? = Tomorrow is what day?

ʻO ka Pōʻakahi ka lā ʻapōpō. = Tomorrow is Monday.