Diurnal: of or during the day.
Nocturnal: done, occurring, or active at night.
Matutinal: of or occurring in the morning.
Vespertine: relating to, occurring, or active in the evening.
Crepuscular: of, resembling, or relating to twilight.
Out of the five words, I’ve only regularly seen nocturnal being used. However once I read crepuscular somewhere and wrote it down in my notebook. Now I forget where I read it and what the context is. I am not a crepuscular person who’s only active during the twilight periods, but I love dawn and dusk. I think many people are like me. So crepuscular is a nice word to me, although it doesn’t sound like English–probably a Greek or Latin word.
Long ago, I worked in a hospital for a year and talked to two nurses regularly since we shared the dorm room for staff members. They complained about the night shifts constantly. According to them, night shifts are very unsuitable for healthy human existence since they can’t sleep well during the day no matter how tired and sleepy they are. I wouldn’t know this unless I really talk with people who have night shifts. Later I read something that says nocturnal activities disrupt the circadian rhythm of the body, putting people in a constant jet lag mode, rather damaging to the health.
Haoyan Do 
Very interesting- I always enjoy learning new words. I really like how you used them too.
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Thank you. I tried and we do what we can. I know I am using a little cup to deal with an ocean of words. LOL.
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I enjoy your new words very much and am already looking forward to your next discoveries … so far only nocturnal has crossed my literary reading world 😄. Will keep my eyes peeled for those others … Lovely night shift story … chapeau to all those who are there for us day and night!
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Thank you for such an encouraging message. Yes, nocturnal is the only regularly appearing words I’ve encountered in TV channels like animal planet and discovery etc. I’ve never had night shifts myself, but the job is very challenging.
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Night shifts are night mares for me too. Even after long years in hospital I can’t work it out just because I cannot sleep during the day and it makes me really tired.
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Wow. That’s hard. I know how important sleep is ever since I had two periods of insomnia, each one month. I almost went mad.
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Salute to all who do night shifts in the line of duty because it must be tough as it does upset the circadian rhythms..
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That’s true. We all salute to those who do night shifts. They keep the world go around and the world should appreciate them more. Much more.
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These words are cool. And yes, I experienced working nights in the past and it was tough. Science has proven how bad it is for the health, too. Sadly, there are many people who have to work nights.
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Even if it’s OCD, I think it’s the good kind😅
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LOL. Probably can be called wordmania or vocabumania. LOL.
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I have never heard of the words except nocturnal.
Night shifts are terrible. It’s unhealthy to be awake and working during those hours. But then we need people during those hours too.
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That’s so true. Night shifts are very necessary, but the jobs are no good to human body. That’s just the truth. I really think night shifts should be paid much more since it is so demanding on the body.
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Totally agree with you.
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😊😉😍
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I’ve heard most of those words before, although I’d say nocturnal is the most commonly used.
I used to work 2nd to 3rd shift (evenings to night) in this one office. Those nurses are right, it’s very damaging to the human body.
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True. I often hear nocturnal in the animal planet or discovery channel. LOL. Yes, night shifts are tough jobs. I really think night shifts should be paid much more since it is so demanding on the human body, but usually it is not. This is just to say how unfair many systems are.
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Very and do I have stories to tell.
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👍😉😊
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I’ve seen diurnal and nocturnal used in descriptions of animal habits and I have read crepuscular a couple of different places but I don’t remember where. The other two are new to me.
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Me too about crepuscular. Read it somewhere. I don’t know how the other two are used and I can’t even imagine somebody (or some animal) who are only active in the morning, or only in the evening. LOL. There must be ones. 😍😉😊
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Great words and interesting to read about night shifts!
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Yes, night shifts are no good for homo sapiens who are not nocturnal. LOL.
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I love this! Great work, my friend! I thoroughly enjoyed reading 🖤🤗
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Thank you. LOL. 😊😜😉😍
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