We Nigerians especially Yoruba knows how to greet people o and with respect too. You will hear:
Ẹ káàárọ̀ (good morning),
Ẹ káàsán (good afternoon),
Ẹ káalẹ́ (good evening),
Ẹ kú ọjọ́ mẹ́ta (when you have not seen someone for some days/in a long time ),
Ẹ kú ìrìn (when you are on the road, walking),
Ẹ kú ìdúró (when you are standing),
Ẹ kú àtijọ́(when you haven't seen someone in a long time),
Ẹ kú ewu Ọmọ/ẹ kú ọwọ́ l'ómi(when you just put to bed),
Ẹ kú ìyànjú (when you are putting efforts on something),
Ẹ kú ișẹ́(when you are working hard/weldone),
Ẹ kú àpéro (when you are in a meeting),
ẹ kú ìnáwó (when you just spend some money to acquire something),
Ẹ kú ìjókòó (when you are sitting down),
Ẹ kú ọdún (Whenever we are in the festival),
Ẹ kú àjàbọ́(when you eventually accomplish a project),
ẹ káàbọ̀(you are welcome),
ẹ kú ilé(When you are greeting someone you meet in the house),
ẹ kú ìmúra (when you are preparing for an event),
ẹ kú oríire(congratulations),
ẹ kú àṣeyọrí(congratulations)
ẹ kú ìgbádùn(when you are relaxing),
ẹ kú ìtọ́jú(when you are taking care of somebody),
ẹ kú ìrọ́jú(when you are enduring a situation)
ẹ kú ámúmọ́ra(when you are enduring some pain),
ẹ kú àmójúbà(when someone you have not seen in a long time come visiting), Ẹ kú ìdèlé(when you are holding forth at the home front),
Ẹ kú àsèhìndè(when you are bereaved),
Ẹ kú òùngbẹ (When you are fasting),
Ẹ kú àsè (When you are having a feast),
Ẹ kú aisun(when you are having a vigil),
Ẹ kú àdúrà (When you are praying)

Add yours.... Don't spoil the fun

That is the beauty of our culture.

e ku ewa(when making your hair or applying makeup)

lovely