Daylight Saving Time

The "Sahara Desert" is a broad expanse of northern Africa, roughly from about 10 degrees north latitude to about 23 degrees north latitude. There are a number of smaller "regional" areas that are often lumped together by the term "Sahara".

The precise amount of sunlight would vary by date and by latitude, but let's use 20N and December 21. That spot gives us about 10 hours 55 minutes of sunlight for the shortest day of the year. That close to the equator, there won't be a large difference in the duration of sunlight during the course of a year. At the equator, of course, the length of the days and nights are pretty much equal throughout the year.

The US Naval Observatory's web site has a calculator that can generate the precise time of sunrise and sunset for any location and date. See the link below to generate your own calculations for the precise location and date you're interested in.

No, Utah is in the Mountain Time Zone, which is UTC-7 during standard time and UTC-6 during daylight saving time. It is not one hour ahead.

When daylight saving time begins, the clock change makes it seem like an hour of morning sun is moved to the evening. So DST effectively "delays" sunrise by an hour as shown on your clock. For those in the northern part of the US, it will be mid-April before the sun rises at an earlier time than just before DST in March.

So, for example, if the sun is rising at 6:30 AM and setting at 6:30 PM just before the change, the sunrise time becomes 7:30 AM and the sunset time becomes 7:30 PM.

There is not a set date for either of these times. Nevertheless, they follow the rule that the last Sunday in March the clocks go forward. The last Sunday in October the clocks go back. This can be remembered with the mnemonic "the clocks spring forward in spring and fall back in fall"

Including the start and end dates in the calculation, there are 290 days between the two dates.

April 17, 1979 fell on a Thursday.

Summer mornings in Florida are typically warm and humid, with temperatures already rising into the 80s by early morning. It can be quite peaceful with the sun rising over the palm trees and birds chirping, but it's important to plan outdoor activities early to avoid the intense midday heat and afternoon storms that are common during the summer months.

During the summer, for the Northern Hemisphere, the Earth is tilted so that the sun is shining more on the northern hemisphere. Imagine a globe, which is normally always tilted, and shining a flash light from the side of it and moving the globe so the top is more toward you. You will see how there is more light. And when there is more light shining, it lasts longer, hence the hours. Hope this helps.

Eastern Daylight Saving Time was not in use on the 21st of December 2010 (unless you are referring to Australian Eastern Daylight Saving Time). Even if it were, you would need to specify a city or a set of geographical coordinates.

All countries experience, at least in some regions, the absence of the sun. So, no country never gets dark.

Nevertheless, areas near the Arctic and Antarctic circles - the extreme norths and souths of the globe - can endure long periods of light and dark. The links below outline how this works.

Your best bets for countries with little darkness would be those very close to or bordering the Arctic/Antarctic Circles. These are: USA (Alaska), Canada, Denmark (Greenland), Iceland, Norway, Sweden, Finland, Russia or any country with claims of Antarctica.

On October 22, 2009, the sun rose in Miami, FL at around 7:25 AM Eastern Standard Time.

Yes and no, in the Northern Hemisphere June 21st is the longest day of the year but June 21st is also the shortest day of the year in the Southern Hemisphere.

In the northern hemisphere, it is the longest day of the year in terms of the amount of daylight hours because the northern hemisphere is tilted to its maximum towards the sun. For simplicity we usually refer to the 21st of June as being the longest day, but sometimes it can actually be on the 20th of June or on the 22nd of June.

For simplicity:

For the northern hemisphere = Yes

For the southern hemisphere = No

If you live north of about 54 degrees, the nights are noticeably darker in winter than summer. This is because the sun goes much further below the horizon during the winter than during the summer, which means that in the summer "night" there is still light in the sky.

Muslim prayer times vary throughout the day and are based on the position of the sun. The five obligatory prayers in Islam are Fajr (before dawn), Dhuhr (midday), Asr (afternoon), Maghrib (just after sunset), and Isha (night). Worshippers can find specific prayer times for their location using prayer time calculators or Islamic apps.

It fell on a monday

In Spanish, you say "cambio de horario de verano" to refer to the Daylight Saving Time change.

The longest period of daylight typically occurs during the summer solstice, which falls around June 21st in the Northern Hemisphere and around December 21st in the Southern Hemisphere. During the summer solstice, locations closer to the poles experience up to 24 hours of daylight due to the tilt of Earth's axis.

Try this (it works for a similar model): For the Sharp SPC374T Atomic Clock - Time Zone setting- Press the "Time" button once, the time zone will show where 'Day' usually is (e.g., "PA" for Pacific), use the Up or Down button to adjust. Press the time button once to save.

Nightfall, also known as twilight, typically lasts for about 30-40 minutes after sunset. It is the period when the sky gradually darkens as the sun goes below the horizon. During this time, the sky transitions from the blue hour to complete darkness.

That's only true in the summer. In the winter, it's the opposite, the nights are long, only 3 or 4 hours of daylight. The further north you go, the more extreme the day/night cycles are.

This is because the earth isn't "straight up and down" aligned with the sun. The earth is tilted, and as it rotates around the sun, the tilt is pointing closer towards the sun part of the year, and pointing away from the sun the rest of the year. Imagine the hands of a clock as being the poles of the earth. Instead of being at 12 and 6, the hands of the clock are at 10 and 4. Now walk with the clock around a lamp or a light source, always keeping the 10-hand pointed in the same direction. As you go around the light, you'll see the 10-hand point towards the light, then on the other side, point away. This experiment shows the seasons in the northern and southern hemispheres.

Also, take a look at the hand pointing towards the "4". The same effect is true there as well, so the same long-days in the summer, short-days in the winter effect happens in the extreme south as well, just at the opposite time of year.

Time zones became necessary with the invention and installation of railroads around the planet. That was 1815 in the USA. Several decades later, after time confusions became pandemic, the railroads in the USA actually defined the first four time zones:

"On November 18, 1883, America's railroads began using a standard time system involving four time zones, Eastern, Central, Mountain and Pacific. Within each zone, all clocks were synchronized." [History Newsletter]

Daylight saving time changes are intended to make better use of natural daylight during the longer days of spring and summer, extending the daylight hours in the evening. This practice is believed to help save energy, reduce reliance on artificial lighting, and promote outdoor activities.

Daylight saving began in 1916 in Germany. In order to conserve fuel, Germany decided to advance the hands of their clocks by one hour on April 30, 1916 and then set the clocks back to standard time in October of that same year. Many European countries followed suit and couple of years later, so did the United States.