why at night but in the morning ?

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https://www.reddit.com/r/etymology/comments/7wgcxy/why_do_we_say_in_the_morning_but_at_night

https://www.reddit.com/r/etymology/comments/7wgcxy/why_do_we_say_in_the_morning_but_at_night
Why do we say in the morning but at night? – Reddit
Why do we say in the morning but at night? Title says most of it, but I guess I could expand the question further to ask how we come to use different prepositions for very similar ideas (in December vs. on Christmas vs. at 2:00). I know English is notorious for its seemingly arbitrary preposition usage but is there any pattern at all? 117

https://blog.aarp.org/sexology/pepper-schwartz-morning-erection

https://blog.aarp.org/sexology/pepper-schwartz-morning-erection
I Have ED But Get Morning Erections. What Gives? – Blogs
Dr. Pepper Schwartz: CG, there could be a couple of reasons. Testosterone is generally higher in men in the early morning, so depending on what time you wake up, you might be experiencing a surge of male hormone.

https://disciplinedrebel.com / why-am-i-motivated-at-night-but-not-in-the-morning

https://disciplinedrebel.com / why-am-i-motivated-at-night-but-not-in-the-morning
Why You Are Motivated at Night but Not in the Morning
Here is what you are probably experiencing when you feel motivated at night but not in the morning: At night, you dream up things you want to get done the next day. The next morning, you wake up unmotivated, and don’t follow through with your goals. Even when you do get SOME things done at , you are still dissatisfied.

https://www.mayoclinic.org/diseases-conditions/diabetes/expert-answers/dawn-effect/faq-20057937

https://www.mayoclinic.org/diseases-conditions/diabetes/expert-answers/dawn-effect/faq-20057937
The dawn phenomenon: What can you do? – Mayo Clinic
12 nov. 2022The dawn phenomenon is an early-morning rise in blood sugar, also called blood glucose, in people with diabetes. The dawn phenomenon leads to high levels of blood sugar, a condition called hyperglycemia. It usually happens between 4 a.m. and 8 a.m. The cause of the dawn phenomenon isn’t clear.

https://time.com/5521313/why-you-feel-sicker-at-night

https://time.com/5521313/why-you-feel-sicker-at-night
Here’s Why You Always Feel Sicker at Night | TIME
February 6, 2019 10:00 AM EST W hether you’re dealing with the common cold, the flu or a stomach bug, you’ve probably noticed that your symptoms feel worse at night. You’re not imagining things….

https://www.tuasaude.com/en/fever-at-night

https://www.tuasaude.com/en/fever-at-night
Fever at Night (Gone in the Morning): Causes, & Treatment
A fever at night usually occurs due to increased functioning of the hypothalamus in the brain at night. This is a normal phenomenon, and can especially be triggered by infection or inflammation somewhere in the body (like a cold or strep throat) or a more serious disease like lupus, HIV or cancer. People tend to notice a fever during the day …

https://www.emedicinehealth.com/why_do_i_cough_in_the_morning_and_at_night/article_em.htm

https://www.emedicinehealth.com/why_do_i_cough_in_the_morning_and_at_night/article_em.htm
Why Do I Cough in the Morning and at Night? – eMedicineHealth
13 sept. 2022Coughing in the morning and at night can be caused by the common cold, COVID-19, pneumonia, whooping cough (pertussis), postnasal drip, allergies (allergic rhinitis), sinus infection, asthma, chronic obstructive pulmonary disease (COPD), lung cancer, gastroesophageal reflux disease (GERD), smoking, congestive heart failure, and others.

https://english.stackexchange.com/questions/121858/at-night-or-in-the-night

https://english.stackexchange.com/questions/121858/at-night-or-in-the-night
At Night or In the Night? – English Language & Usage Stack Exchange
Why do we refer to morning, afternoon and evening as ‘in the morning’, ‘in the afternoon’, ‘in the evening’ but not ‘in the night’ instead we say ‘at night.’ meaning grammar prepositions Share Improve this question Follow edited Mar 13, 2015 at 13:32 Kit Z. Fox ♦ 27.8k 23 111 187 asked Aug 7, 2013 at 22:39 Jitendra 429 1 4 4 9

https://health.clevelandclinic.org/why-do-you-always-wake-up-at-3-a-m

https://health.clevelandclinic.org/why-do-you-always-wake-up-at-3-a-m
4 Reasons Why You’re Waking Up at 3 a.m. – Cleveland Clinic Health …
What’s causing your 3 a.m. wake-up call? Waking up at night — at ungodly hour — isn’t a problem on its own. However, waking up and staying awake can be. According to Dr. Kane, the real worry comes when those wake-up calls keep you up until the birds are chirping.

https://news.vanderbilt.edu/2020/02/27/fasting-at-night-or-in-the-morning-listen-to-your-biological-clock-says-new-research

https://news.vanderbilt.edu/2020/02/27/fasting-at-night-or-in-the-morning-listen-to-your-biological-clock-says-new-research
Fasting at night or in the morning? Listen to your biological clock …
According to a new study published by biological science researchers at Vanderbilt, the answer to eating (or fasting) windows lies in the circadian rhythms of the body’s biological clock. lesoutrali bot