DUTCH CULTURE: GReeTings

WHen to say "HELLO"?
This is one of Dutch cultures which I like...GReeTinGs. They greet everyone ... strangers and young ones.
When you meet family members and friends you give THREE KISSES of course on the cheek and guys they shake hands.
They have differents way in saying "hello"
When you meet people on the street or anywhere during
daytime: You will say "DAG" (which means hello) to older people
"hallo" or "hoi" to people at your age
or "Goedemorgen"  (which means Good morning) to everyone.
night time: You will greet "Goedeavond" means Good evening.
When you get into a bus, the driver will greet you and so you do the same.
When you are in the store. The cashier greets you.
THEY ALWAYS SAY HELLO, GOOD MORNING OR GOOD EVENING.
THEY ALWAYS SAY GOODBYE
THEY ALWAYS SAY GOODNIGHT.
THEY ALWAYS GREET EACH OTHER.
Do you have any practices in your country which you think you must be proud of?