It depends on age and genetic link.

There is a study  published in the journal Frontiers in Neurology,  Scientists Identify Genetic that control themز

Read the article at the link.

http://www.iflscience.com/health-and-medicine/scientists-identify-genetic-difference-between-early-risers-and-late-sleepers

" I take the link from my friend Fred Kitchen Facebook"  https://www.facebook.com/profile.php?id=20722410&fref=pb&hc_location=friends_tab&pnref=friends.all

Hello

This occurs by biological and genetic forces , Different chronotypes are associated with genetic variations, as well as differences in lifestyle and mood disposition, cognitive function and risks for health problems as sleep disorders and depression.

Good Luck

http://rs1.chemie.de/images/24316.pdf

http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4225198/

http://www.huffingtonpost.com/dr-michael-j-breus/night-owl-sleep_b_4276411.html

Young persons are generally late sleepers, I think from instinct. I contribute that to our ancestors way back when they had to hunt at night. Competition was intense during the day with many large predators around, so they had to look for food at night. Habits are difficult to change.

Hello Qasim,

Kriegsfeld and Nelson in their chapter Biological rhythms (Handbook of Neuroscience) described circadian rhythms within a cell which are produced by the authoregulatory transcriptional/translational negative feedback loop which takes approximately 24 hours. They suggested that while the general mechanism for circadian oscillations is common among organisms, the components comprising this feedback loop differ.  Such differences in a core feedback loop of the molecular clock at the cellular level might explain at least partially different behavioural phenotypes.  However, most likely it is both a gene and environment interactions that underlie different behaviour phenotypes.

Kind regards,

Tatyana

It depends on age and genetic link.

There is a study  published in the journal Frontiers in Neurology,  Scientists Identify Genetic that control themز

Read the article at the link.

http://www.iflscience.com/health-and-medicine/scientists-identify-genetic-difference-between-early-risers-and-late-sleepers

" I take the link from my friend Fred Kitchen Facebook"  https://www.facebook.com/profile.php?id=20722410&fref=pb&hc_location=friends_tab&pnref=friends.all

That is a  nice question. Informative answers too...

I used to sleep early (about at 09.30 pm) and get up early (04.00am-04.30 am). It is my habit since my childhood. I think there is an element of routines activities one practice from childhood. 

I agree with Saleh Alkarim who has given a good answer.  I just add that there is a lot of truth in: "Early to bed, early to rise, Makes a man (woman) healthy and wise".  Have a look at this link.

"Patients with mood disorders show a high dependence of behavior on the molecular characteristics of the biological clock. CLOCK rs1801260 gene polymorphism influences circadian behavior in bipolar disorder (BD), with *C carriers showing a delayed sleep onset and worse insomnia. Sleep phase delay and insomnia associate with suicide in the general population..."

Article Effects of CLOCK gene variants and early stress on hopelessn...

Dear Qasim Mohammed Hussein, 

Of cause  and effect - sets the connection between the phenomena in which one phenomenon called cause, under certain conditions produces another phenomenon called the investigation.

This is one of the main and primary laws of the universe, which governs all things. everything that happens to a person or the world, there is a reason, and any reason, inevitably gives rise to the investigation, and see whether we understand them or not.

For example, a stone thrown through the window is the cause and consequence of the broken window of an abandoned stone.

Understanding the cause - effect relationship, it is necessary to fully understand the essence of the phenomena. To understand that because of what it had happened and what the consequences in the future may bring.

Regards, Shafagat

Get up at the same time each day, 7 days a week, no matter how little you slept. This is a sleep restriction principle and also aimed at better sleep by having a short time to sleep onset. It also has a basis in circadian rhythm (body clock) factors. In addition, it is supported by research in to lifestyle regularity, which has shown there was a significant correlation between higher levels of lifestyle regularity and fewer sleep problems

http://services.unimelb.edu.au/counsel/resources/publications/better_sleep

I do have Sleep Apena, so it's not always easy to rise early in the morning if I am up most of the night.

DF

Dear Colleagues,

Good Day,

I bet you’ve heard this quote before:

“The early bird gets the worm but the second mouse gets the cheese.”

                                                        – Jeremy Paxman

Dear all,

Good day,

Beautiful quote @ Hazim.

Regards

Dear Colleagues,

Good Day,

If that makes the night owls among us want to hide under the covers, the good news is that it is possible to reset our clocks and change our mindset to get better quality sleep. Here are five ways to do so.

1. Switch off: Scientists advise minimizing exposure to artificial light of an evening, “Bright light at night contributes to delaying the body clock, but the major factor is engaging mentally through interactive technology usage, like texting, speaking on the phone, surfing the web”.

2. Put a cap on the booze and caffeine: Studies show alcohol makes you tired and compromises the quality of your sleep, just like caffeine. “If drinking alcohol, stick with a glass or two, allowing your body time to metabolise what you've consumed,” Dr Jessica Paterson, from CQUniversity Australia, says.

3. Have sex: “Thinking about one's troubles and daily hassles induces cortisol (a stress hormone), which will inhibit sleep.

4. Learn to love routine: Dr Paterson recommends exercise or a warm bath a few hours before bed. “A consistent pre-bed routine 'primes' the brain and body for sleep.”

5. If all else fails, consider a career change: “It is misguided to try to change yourself to fit your lifestyle and healthier to change your lifestyle to fit your body," Dr Jonason says. "Better to get a job that fits your chronotype than try to rearrange your chronotype to fit your job. Going against one's biology rarely works out well. Your body is wiser than you think you are”.

Read more, please, see the following attached sites:

http://www.huffingtonpost.com/dr-michael-j-breus/night-owl-sleep_b_4276411.html

http://www.iflscience.com/health-and-medicine/scientists-identify-genetic-difference-between-early-risers-and-late-sleepers

http://www.dailymail.co.uk/sciencetech/article-1173028/How-night-owls-cleverer-richer-people-rise-early.html

http://www.dailymail.co.uk/sciencetech/article-2440275/Sleep-pattern-research-shows-early-risers-night-owls-brain-differences.html

http://www.webmd.com/sleep-disorders/features/early-bird-night-owl

I guess we all are destined to make it at different time and until it is time we cannot change it.

Sleeping on side could lower risk for Alzheimer's disease

http://www.msn.com/en-in/health/medical/sleeping-on-side-could-lower-risk-for-alzheimers-disease/vi-BBlGvXH?ocid=mailsignoutmd

Early to bed and early to rise makes a man healthy, wealthy and wise.

---- Benjamin Franklin

“The time just before dawn contains the most energy of all hours of the day. This has helped me become an early riser and an early doer…. When I wake to see that it’s light out already, I feel the world has started without me.”

~Terri Guillemets

“The difference between rising at five and seven o’clock in the morning, for forty years, supposing a man to go to bed at the same hour at night, is nearly equivalent to the addition of ten years to a man’s life.”

~Philip Doddridge

“Early rising not only gives us more life in the same number of years, but adds, likewise, to their number; and not only enables us to enjoy more of existence in the same time, but increases also the measure.”

~ Caleb C. Colton

Dear all,

Good day,

Nice posters from Fateh

"The early bird gets the worm"  proverb suggests that getting up early will lead to success during the day.

The answer lies in each individual's biological internal clock -- or circadian rhythm, as scientists call it. "The human clock is about 24 hours, thanks to Earth's 24-hour light-dark cycle," Sharkey says. "But some people have a slightly longer natural cycle, and some are slightly shorter."

If your circadian rhythm is on the long side, you're more likely to be a night owl. If it runs short, you're probably an early riser.

But your circadian rhythm can change over your lifetime. "There's a developmental piece to this puzzle -- school-age children are generally early birds, while teenagers tend to be night owls, and then as they age, adults gradually transition back into morning people.

http://www.webmd.com/sleep-disorders/features/early-bird-night-owl

I started learning English language at the age of 11 years old (in 1963). My excellent  English teachers "planted" in the heads of my classmates & me : Early to Bed, Early to Rise - Makes the Man Healthy, Wealthy, and Wise. For many years, I took that as a rule for success but , later on, my biology teachers told me that sleeping/waking up habits follow what the person becomes used to for a duration of time until a "biological clock" is developed. Any one of us can switch from the state of early "bird" to a state of late night "bird", or vice versa by getting used to a certain state.

Dear Qasim,

This is interesting. 

Maybe the differences have to do with the pineal gland function that may vary between individuals.

Personally, I am certainly an "early bird" since childhood. I was always the first to wake up in my family. I believe that in my case it derives from the fact that I sleep soundly and for many uninterrupted hours. I seldom suffer from insomnia. Stress makes me sleepy.Most of the problems in my life are usually solved after a good night sleep.

I will go to sleep anywhere, at any time of the day, and usually for as long as I wish. (When I was a medical student, I would go to sleep for 15 minutes as often as I wished, and then woke up freshly to proceed with my study...) I have gradually lost that ability to keep awake for long periods during the night... But I always wake up before any alarm clock, as I program my brain easily for sleep.

It may take some training.

http://www.endocrineweb.com/endocrinology/overview-pineal-gland

 Interesting link dear @ Maria.

It shows the power of the knowledge of anatomy. Most individual phenomena can find explanation in the knowledge of individual anatomical variations.

Also, the knowledge of your inner self, as taught through yoga concentration will lead you to better self control and can certainly help with sleeping disorders. 

It is now 6 am and I am fresh as a lettuce , ready for another day, after my 8 hour sleep.

See ...

What are the reasons that some people are early risers and others are late sleepers?

It’s in our genes

The simple answer is yes. A number of studies have identified genes that influence a person’s chronotype. The genes known as PER1, PER3 and ABCC9 all play a role in regulating our body clocks and vary predictably among people of different chronotypes.

And in our brain

Scans have also found true structural differences between the brains of early and late risers. In night owls, the quality of the white matter in the brain is compromised. White matter has the job of ensuring effective communication between the nerve cells and changes here have been linked to depression and other psychological problems.

http://espressoscience.com/2014/09/17/can-a-night-owl-become-an-early-bird/

Some people are early risers and others are late sleepers - agreed with the above scholars' comments i.e. can due to genetic, age, habitual etc. 

Think 1 of the reasons also include a person's life-style preference.  For example, some people prefer to work late / late sleepers because during that time (mid-night) they have less disruption as children were asleep & it is quiet.  On the other hand, some people get up early (early risers) so that they can have quiet time with God, fetch children to school, avoid traffic jam during rush hours and reach office early so that the environment is still quiet & s/he might have more time, more inspiration, more productive in work etc.

Another reason why there are early risers & late sleepers is also due to jet lag especially inter-continental long distance travel in which sleeping hours being disrupted temporary.  However, this can be adjusted / back to normal after a while.

       Benefits of Rising Early, and How to Do It

“Early to bed and early to rise makes a man healthy, wealthy and wise”

– Ben Franklin, famously

“Put no trust in the benefits to accrue from early rising, as set forth by the infatuated Franklin …”

– Mark Twain

Now, let me first say that if you are a night owl, and that works for you, I think that’s great. There’s no reason to change, especially if you’re happy with it. But for me, switching from being a night owl to an early riser (and yes, it is possible) has been a godsend. It has helped me in so many ways that I’d never go back.

Here are just a few: See Link!

http://zenhabits.net/10-benefits-of-rising-early-and-how-to-do-it/

Sleep plays an important role in your physical health. For example, sleep is involved in healing and repair of your heart and blood vessels.

http://wellnessmama.com/9340/sleep-important-for-health/

Dear Colleagues,

Good Day,

Early Risers Crash Faster Than People Who Stay Up Late

Early birds may get the best worms—or at least the best garage sale deals—but they also tire out more quickly than night owls do. In a new study researchers Christina Schmidt and Philippe Peigneux, both at the University of Liège in Belgium, and their colleagues first asked 16 extreme early risers and 15 extreme night owls to spend a week following their natural sleep schedule. Then subjects spent two nights in a sleep lab, where they again followed their preferred sleep patterns and underwent cognitive testing twice daily while in a functional MRI scanner.

An hour and a half after waking, early birds and night owls were equally alert and showed no difference in attention-related brain activity. But after being awake for 10 and a half hours, night owls had grown more alert, performing better on a reaction-time task requiring sustained attention and showing increased activity in brain areas linked to attention. More important, these regions included the suprachiasmatic area, which is home to the body’s circadian clock. This area sends signals to boost alertness as the pressure to sleep mounts. Unlike night owls, early risers didn’t get this late-day lift. Peigneux says faster activation of sleep pressure appears to prevent early birds from fully benefiting from the circadian signal, as evening types do.

Please, see the following links for details:

http://www.iflscience.com/health-and-medicine/scientists-identify-genetic-difference-between-early-risers-and-late-sleepers

http://www.huffingtonpost.com/dr-michael-j-breus/night-owl-sleep_b_4276411.html

http://www.scientificamerican.com/article/early-risers-crash-faster-than-people-who-stay-up-late/

http://www.cjob.com/2015/09/15/scientists-identify-genetic-difference-between-early-risers-and-late-sleepers/

Rising Early:  advantages

• Time to exercise and get that “out of the way”
• Time to plan
• More willpower
• A clear mind, with better focus and less distraction
• Feelings of being in control and in charge
• Higher productivity and accomplishment
• The ability to anticipate what may go wrong during the day
• Optimism
• Better sleep patterns: I went to bed earlier to get up this early. I’ll make the most of that snooze time, which should be between seven to nine hours nightly.

- See more at: http://mindyourbody.tv/benefits-of-getting-up-early/#sthash.Hc8w67Uh.dpuf

i think its controlled by ones intention, how he/she  used to woke up or sleep on particular time,

 some people like Muslims wake up during early dawn /fajar time, so the religion also plays its own role

It is the old saying that ''early to rise & early to bed'' this is the way to be happy & Gain .

For late sleepers in a day time their mind is all the time working for his plan ,Action ,& such person desire to carry their  work as per decided time & till the completion & only after which they go to bed .

Apart from the above certain person have their life problem for which they are having WORRIES,TENSION,FRUSTRATION ,such person in order to have sleep their mind occupies   with their disturbing phase & as such they don't get the sleep .

Early risers are determined to do what they have to do, however late sleepers are more hard working in spite of late night, however both of them are following their HABIT of routine life, both style have cause and effect , merits and demerits....

Hi Qasim, that's a great question. Many have already provided scholarly texts that explain reasons. I'll give you my more simple answer: rebellion, prolonged.

I suppose it is common for parents to get their children to bed early. It was also true in our household. We were even made to go to bed early-ish, in the years leading up to when we left for university.

So, obviously, once outside the old nest, my brother and I could go to sleep late and get up late. What could possibly be not to like? (The only problem was classes that sometimes started at 8:00 in the morning.)

My question to everyone else is, was this not your experience too? It must have been! And if so, why would you ever change that feeling of liberation, when you could finally set your own hours? I still like to stay up late, and still like to sleep late, and cannot fathom why anyone would revert to the schedule they had to endure when they were 8 years old..

My other question is, why do those of us who prefer this schedule have to conform to the early risers? Is that democracy? If you want to call a meeting, call it at 5:00 in the afternoon, for heaven's sake!