Greetings like “Good morning!”, “Good afternoon!”, “Good evening!” started being used among gentlemen at the end of the 17th century. The rich Russian language allows to greet in different ways and show goodwill. “Good morning!“ means “Доброе утро!” (“Dobroye utro!”) in Russian. You can say it before 12 o’clock in the afternoon. You’re not supposed to address to people who have a higher status or rank than you do using these greetings. On the other side, one’s betters can greet subordinates in this way. “Good morning!” is an official greeting.