Sé exactamente cuándo sucedió eso.

[Karab]

Translation: I know exactly when that happened.

I’m pretty confident ocurrió works here too. And am also inclined to think pasó would work. Thoughts?

[dain]

yes “pasó” and “ocurrió” are both acceptable here

[cazort]

Is there any difference in connotation between the three words?

[veikkapiri]

+1 - I want to know this too.