2012年3月26日 · Looking at the ngrams of both, good night has a more frequent use. Goodnight has only appeared recently, suggesting that it has been introduced – but is correct to use. I would write "Goodnight, sweetheart" and "Have a good night". I also think that "goodnight" is just a shortened way of saying "have a good night".

might seem like another possible explanation of "good", but the mention that good bye is influenced by good day and good evening immplies that these were already established, which the entry for good day confirms. good day salutation, late 14c., short for have a good day (c.1200). Good morning is c.1400, gode morwene. Good night, also goodnight ...

2016年12月29日 · OED lists both night and 'night: ‘Good-night. I'm goin' to roost.’ ‘Night, Dave.’ (1912) Being the Story of What Happened When Buck Peters, Hopalong Cassidy, and Their Bar-20 Associates Went to Montana ‘'Night.’ ‘'Night.’ It was cold in …

2013年1月21日 · "Good night" as a greeting was once a feature found almost exclusively in Ireland. In James Joyce's "The Dead", for example, it is used both as greeting: —O, Mr Conroy, said Lily to Gabriel when she opened the door for him, Miss Kate and Miss Julia thought you were never coming. Good night, Mrs Conroy. And as a farewell:

2011年2月18日 · "Good night" as a greeting was once commonly found in Ireland, but almost exclusive to there. In James Joyce's "The Dead", for example, it is used both as greeting: —O, Mr Conroy, said Lily to Gabriel when she opened the door for him, Miss Kate and Miss Julia thought you were never coming. Good night, Mrs Conroy. And as a farewell:

I would not say "Have a good night" except perhaps to somebody I was expecting to stay awake all night. "Have a good evening" would be more suitable for those going to sleep at sensible hours. A simple "Good night" would be a goodbye, in contrast to "Good morning" or "Good evening" as ways of saying hello, and I often use it at any time after ...

The connotation of good night with sleep is out of usage. It just is a shortened form of "May you have a good night." So if someone were to sleep at 1 PM, the parting phrase could be . Good afternoon, have a nice nap. The issue of how the person is …

"Good night," on the other hand, tends to be used as a farewell rather than a greeting. To some extent, I suspect this is a psychological matter: even though we often use "night" as a substitute for "evening," I think in general we associate "night" with much later times than "evening," where we're not normally expecting to have company.

2021年9月5日 · @cruthers The questioner is asking which is the more formal rather than which is formal and which is intimate. I would say, as you have, that "sleep well" is always relatively intimate but that "good night" although it can be used in informal settings (it would be appropriate for a romantic partner to say "good night darling" or for a parent to say "good night" to a child for example) it can ...

"Good night" as noted by yourself means to have a good night's sleep, so "Good Evening" is used instead. "Evening" lasts from after Afternoon(4 p.m.) till after sunset, depending on where you live. There is also "Dusk", which could be used for the time right after the sun goes beneath the horizon, and the sky is dim, but not dark.