At which hour does the following start?
1) ночи (genitive of ночь, night)
2) утра (genitive of утро, morning)
3) дня (genitive of день, day or afternoon)
4) вечера (genitive of вечер, evening)
My sources give conflicting information.
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Sign up to join this communityAt which hour does the following start?
1) ночи (genitive of ночь, night)
2) утра (genitive of утро, morning)
3) дня (genitive of день, day or afternoon)
4) вечера (genitive of вечер, evening)
My sources give conflicting information.
As far as I know, there is no firm rule about that. From my experience I can say that:
In interval [00:00 ; 04:00) it is "ночи".
In interval [04:00 ; 05:00) it can be either "ночи" or "утра".
In interval [05:00 ; 12:00) it is "утра".
12:00 is usually "дня", but sometimes can be "утра".
In interval (12:00 ; 17:00) it is "дня".
In interval [17:00 ; 23:00) it is "вечера".
In interval [23:00 ; 12:00) it can be either "вечера" or "ночи".
Note that these rules work when you tell the time in straightforward way, using only numbers. For example, 16:45 = "четыре сорок пять дня"; 23:30 = "одиннадцать тридцать вечера". But if you use special style designed for telling time, then hour part is essential, no matter how many minutes are there before or after it. For example, 16:45 = "без четверти пять вечера" (not "дня"); 23:30 = "пол-двенадцатого ночи" (not "вечера"); 03:05 can be "пять минут четвертого утра", etc.
More or less like this
23:00 - 05:00
05:00 - 12:00
(with 05:00 - 07:00
usually indicated as "раннее утро")12:00 - 17:00
17:00 - 23:00
(with anytime later than 22:00
usually referred as "поздний вечер")One important thing to keep in mind - while "доброе утро", "добрый день"/"доброго дня", "добрый вечер"/"доброго вечера" are just regular greetings, nothing special with them, "доброй ночи" is something usually told to somebody who is going to sleep right now. That said, it's pretty different from "have a good night" one can hear leaving office at 10pm in USA.
Also it's worth to mention that this, of course, is very contextual. At winter, when sun goes down earlier you easily can hear "Добрый вечер" at 17:00 and even earlier.
Considering all other answers, nobody actually says "17 часов вечера".
This additional information like "ночи" оr "утра" is used when you tell the time in 12h format and not in 24h format:
5 часов вечера is like 5. p.m.= 17:00
or 9 часов утра = 9 a.m.
So basically this is an extended version of "a.m." and "p.m."
It is also often used as a rhetoric device to intensify or emphasize the aspect of time:
Он слушает громкую музыку в 2 часа ночи! = He is listening to loud music at 2 o'clock at night!