So, how are you...
I have heard, ¿Cómo amaneciste? for basically, "How are you doing today/this morning," which prompts two questions: 1-Is that the correct English equivalent? 2-Based of that conjugation, can one also say, ¿Cómo anocheciste? for the evening edition?
2 Answers
The dictionary suggests that your English translation is correct, with the added meaning of "How did you sleep?" as well. Also, I don't think that you can say ¿Cómo anocheciste? although maybe someone can contradict me if I'm wrong on that.
Pumpkin is right. This expression comes from the verb amanecer (to dawn/to awaken), so it really concerns starting the day and not any other time.
And because amanecer is used to note the dawn of the day, we also say ¿Cómo te amaneció? (How did the day start for you?)