Day & Night Map

Day/and Night Diagram

There are 24 hours in a day. The day is divided into day(time) and night(-time). Daytime is from sunrise (this varies, but we can say approximately 6am) to sunset (we can say approximately 6pm). Night-time is from sunset to sunrise. Every day starts precisely at midnight. This means that 12am and 12pm have no meaning. This diagram shows the cycle of a 24-hour day and the words we use to describe its parts.

We experience day and night alternately. Early morning, we see that the Sun rises in the east and sets by twilight in the west always. During the night, we then see the stars move slowly towards east to west direction also. Actually, the Sun and the stars do not move around us! The Earth is the one moving around the Sun.

The Earth’s rotation is like your favorite spinning toy top. The pointed tip that goes through the middle of the top is the top’s axis. Similarly, the Earth has an axis but it is not straight up. This is because the Earth is not spinning upright. The Earth is slightly tilted or leaning on its side by 23.5O degrees while spinning toward the East.

Sunlight falls only on one side of the Earth. This side of the planet will be experiencing daylight. Because the Earth is rotating, the opposite side of the Earth away from the Sun will be experiencing night. After some time, the part of the Earth experiencing daylight will experience night. Rotation of the Earth causes night and day to alternate.

Since we learned that the Earth’s axis is tilted and hence the equator is not facing the Sun directly, different places on Earth would experience unequal length of days and nights—not exactly 12 hours of day and 12 hours of night all the time.

Different places in the Earth experiences different lengths of night and day. The 12 hours of day and 12 hours of night happens only in places near the equator, for example the Philippines. Arctic and Antarctic experience polar day when the Sun stays above the horizon for more than 24 hours and polar night when night lasts for more than 24 hours.

Regular Time Military Time Military Time Pronunciation
Midnight (12:00 a.m.) 0000 or 0000 hours "Zero-zero-zero-zero"
1:00 a.m. 0100 or 0100 hours "Zero one hundred hours"
2:00 a.m. 0200 or 0200 hours "Zero two hundred hours"
3:00 a.m. 0300 or 0300 hours "Zero three hundred hours"
4:00 a.m. 0400 or 0400 hours "Zero four hundred hours"
5:00 a.m. 0500 or 0500 hours "Zero five hundred hours"
6:00 a.m. 0600 or 0600 hours "Zero six hundred hours"
7:00 a.m. 0700 or 0700 hours "Zero seven hundred hours"
8:00 a.m. 0800 or 0800 hours "Zero eight hundred hours"
9:00 a.m. 0900 or 0900 hours "Zero nine hundred hours"
10:00 a.m. 1000 or 1000 hours "Ten hundred hours"
11:00 a.m. 1100 or 1100 hours "Eleven hundred hours"
Noon (12:00 p.m.) 1200 or 1200 hours "Twelve hundred hours"
1:00 p.m. 1300 or 1300 hours "Thirteen hundred hours"
2:00 p.m. 1400 or 1400 hours "Fourteen hundred hours"
3:00 p.m. 1500 or 1500 hours "Fifteen hundred hours"
4:00 p.m. 1600 or 1600 hours "Sixteen hundred hours"
5:00 p.m. 1700 or 1700 hours "Seventeen hundred hours"
6:00 p.m. 1800 or 1800 hours "Eighteen hundred hours"
7:00 p.m. 1900 or 1900 hours "Nineteen hundred hours"
8:00 p.m. 2000 or 2000 hours "Twenty hundred hours"
9:00 p.m. 2100 or 2100 hours "Twenty-one hundred hours"
10:00 p.m. 2200 or 2200 hours "Twenty-two hundred hours"
11:00 p.m. 2300 or 2300 hours "Twenty-three hundred hours"

Standard Time vs. Military Time

The standard time refers to the uniform time for places that lie in the same longitude. Usually, it is established in a region or country by custom or law. It also refers to the local time in an area when Daylight Saving Time is not observed. In the United Kingdom, standard time is also called normal time or wintertime. When DST is followed, the time is called summertime. In the United States and other countries, the standard time is based on 12 hours. Meaning, the time starts at 12:00 am. The time is also written with a colon. For example, If it is one hour past noon, the time is written as 1:00 pm.

Unlike the standard time, time is based on 24 hours in the military time. Meaning, the time starts at 0 and ends at 24. For instance, instead of writing 1:00 pm, the time is written as 1300. You can tell that there is a big difference in standard time vs. military time. First, the time does not restart at 1:00 pm for midday. Second, the military time does not use a colon in separating the hours and minutes. But like the standard time, the first two numbers refer to the hours while the last two digits refer to the minutes. In military time, adding zeros is essential. For example, instead of writing 6 for six o’clock, you will write it as 0600.

The standard time is often used in the United States, mainly if the Daylight Saving Time is not observed. But others tell time using the military time. What is the purpose of it? Does it make any difference? Military time is used to avoid confusion between the morning and afternoon hours. From what you can observe in the standard time, the numbers 1-12 can be used for am and pm. Suppose you have an interview at six o'clock in the morning, you might set the alarm at 6 pm instead of 6 am. To avoid this confusion, military time is used since numbers in hours never repeat themselves.

If you want to use military time, you can use a digital watch or 24-hour clock. Today, most digital watches can be formatted as standard or military time, allowing you to utilize any format. If you have to decide what to choose between standard time vs. military time, you'll probably say that regular time is better. It could be true, especially if it is where you are comfortable. But once you get used to military time, you’ll be able to enjoy several benefits

Benefits of Using Military Time

Following the military time could be quite challenging at first since you are not used to it. But once you can adapt to using it, you can do the following:

Improve your time management.

If you are feeling sleepy and setting your alarm clock, there’s a possibility that you set the time for pm instead of am and vice versa. Wherein if you have military time, you will avoid such confusion. It is also easier to plan activities in a 24-hour clock system.

Calculate time duration easily.

It is easier to calculate the duration of time using military time. For instance, you need to calculate the hours between 10:30 am to 5:30 pm. It is quite challenging to get the duration. If written in military time like 1030 and 1730, you'll quickly determine that the duration is seven hours.

Use a portable 24-hour clock comfortably.

24-hour digital clocks come in small sizes. Instead of using an oversized 12-hour wristwatch, you may prefer the digital wristwatch that is smaller. It can provide more comfort and can keep you updated with time without having any confusion.

There is nothing wrong with choosing any of the standard and military time. Besides, there are smartphone applications that allow you to enjoy both. For instance, you can use the military time to set the alarm in the morning. This way, you’ll avoid confusing am with pm. While using the military time for alarms, you can keep your primary clock with the standard time. What matters most is the time format you are most comfortable with, be it standard time vs. military time.

Some people use regular time while others follow the military time. Although it might be confusing sometimes, know that the main difference between standard time vs. military time is how hours are expressed. In the regular time, the hours are expressed from 1-12, while in military time, hours start from 0-24. However, both standard and military time express the minutes and second in the same way even though there is no colon used in military time. It doesn’t matter how you define time as long as it is accurate. You can use either standard time or military time as long as you are comfortable with it and you are not missing any necessary appointment.

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