The first kiss
The first love
The first car you got from your parents
The prom of your high school
The moment when you turn 18
The moment when you are legally allowed to drink and buy cigarettes, or go the clubs
The moment you got to meet your favorite movie star, singer, or the great leader of your country
The moment when you join in the communist party
The moment when the counter-revolutionary rebellion was crushed in Beijing
The moment when you can freely elect your country's officials