The tricky part is during the early morning hours from midnight (la medianoche) until around 4 in the morning (called la madrugada in Spanish). At this time you could use either buenos das or buenas noches.
The tricky part is during the early morning hours from midnight (la medianoche) until around 4 in the morning (called la madrugada in Spanish). At this time you could use either buenos das or buenas noches.