MSN: The psychology of night terrors: Why 2 AM triggers the most panic Night terrors occur during non-rapid eye movement (NREM) sleep, and since people spend more time in NREM sleep earlier in the night, night terrors are more common during the first third of a night's ... The psychology of night terrors: Why 2 AM triggers the most panic The spoken use of "night" as an informal, familiar version of "good night" (wishing one a restful sleep) is common, but I'm not sure what the proper written equivalent is - if there is one. 4 Day and night time is not an idiomatic or set phrase (unlike day and night), but it can be used appropriately in certain contexts, particularly in technical ones.
Here is a relevant usage I've found: The English word day can be used to refer to the time of daylight or to the unit of time that encompasses both day and night time. Can we use "day and night time" instead of "day and night"? Do you think '2 o'clock in the morning' might somehow actually mean '2 o'clock in the afternoon', as that's the only alternative? I suppose I can see your point if someone says '11 o'clock at night' for 11pm, but again, unless you're above the arctic circle, the distinction with '11 o'clock in the morning', or any normal representation of 11am, is surely clear.
night terror disease, word usage - 1 o'clock in the morning OR 1 o'clock at night? - English ...