"What date is your birthday?"

Translation: ʻO ka lā ʻehia kou lā hānau?

[Mak511906]

"ʻO ka lā ..." - "Aia ka lā ..." How do you know which to use? There must be a rule, or at least an indicator I'm missing. Can someone give me a hint please?

[kelii....]

What date is your birthday? - 'O...

On what date is your birthday? Aia ...

[Mak511906]

Seriously! Makemake Nui au i kōkua. Otherwise I'm never gonna finish this section. Surely there's a rule I'm thus far unable to discern. Kokua mai e ʻoluʻolu.

[Oceanic2]

"'O ka lā 'ehia ka lā hānau o Keoki?" was incorrect on the last pattern I had on the other exercise but "ʻO ka lā ʻehia kou lā hānau?" is correct here. I think that they both should be correct this one for this time and the last one for the last.