Is "buenos dias" always appropriate during daylight hours? and "buenas noches" as soon as it's dusk?
Is "buenos dias" always appropriate during daylight hours? Does one switch to "buenas noches" at dusk until dawn?
2 Answers
It is almost the same as in English. =)
You would use "buenos días" in the morning, "buenas tardes" in the afternoon and "buenas noches" in the evening /night.
Usually "buenos días" is used until about noon, "buenas tardes" until about 6 or 7 in the evening and "buenas noches" the rest of the night.