# Hours, Minutes, & Seconds

Q:

## How many minutes of daylight do we lose each day after June 21st?

A:

After the summer solstice, when days are at their longest, each day starts to become shorter by about one minute every three days. However, this process accelerates and decelerates slightly depending on the particular day.

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• #### Q:What is the history of military time?

A: The history of military time starts in the Egyptian times, specifically the 11th Egyptian dynasty (est. 2100 B.C.). It was the Egyptians who first used the 24-hour clock, and proof was found on a coffin lid known as the Diagonal Star Table. Later on, as warfare progressed, various military forces had to improve their strategy and communications. Hence, military or 24-hour time was adopted to improve accuracy, as the slightest mistake in exchanging information could lead to the wrong move.
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• #### Q:What is the darkest time of night?

A: The darkest time of night is midnight. This is the point exactly halfway between dusk and dawn, or sunset and sunrise, when the sun is at exactly 180 degrees to the observer's position.
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• #### Q:Is 12:00 noon a.m. or p.m.?

A: The time 12:00 noon, no matter the area on the Earth, is neither a.m. nor p.m. The same is true of 12:00 midnight, as it is neither a.m. nor p.m. as well. However, it is widely accepted that noon is considered p.m. and midnight is considered a.m. informally.
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• #### Q:How do you convert 1630 military time to civilian time?

A: Converting 1630 in military time to civilian or standard time is 4:30 P.M. Time conversion is based on the principle of using all 24 hours as they occur throughout the day in order to prevent confusion and avoiding using additional information such as A.M. and P.M.
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• #### Q:How long is 1 billion seconds?

A: One billion seconds is the equivalent of a just a bit longer than 11,574 days, or roughly 31.69 years. It is also equal to 277,778 hours.
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• #### Q:How do you convert 1330 military time into civilian time?

A: To convert 1330 hours in military time to civilian time, subtract 1200 from 1330. The answer is that 1330 hours in military time is the same as 1:30 p.m.
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• #### Q:When do we spring forward?

A: In the United States the action of "springing forward" occurs on the second Sunday in March. This day begins daylight saving time in most areas of the United States, when clocks are moved forward 1 hour.
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• #### Q:How many work hours are there per year?

A: According to the Organization for Economic Co-Development, the average number of actual work hours in the United States, per worker per year was 1,790 in 2012. In 2000, the average was 1,836 for the United States.
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• #### Q:What is the difference between morning, afternoon, evening and night?

A: Morning, afternoon, evening and night are defined as different blocks of time within a 24 hour day. It is generally accepted that morning ends at 12 p.m. Afternoon, evening and night have more subjective boundaries.
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• #### Q:When were clocks set back in 2014?

A: Clocks were set back an hour on November 2, 2014, at 2 a.m. to mark the end of Daylight Saving Time (DST). Clocks were initially set an hour ahead on March 9, 2014, at 2 a.m.
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• #### Q:When does daylight savings time begin in 2015?

A: Daylight Savings Time in 2015 began on Sunday, March 8 at 2 a.m., at which time the clocks in areas that observe it were set ahead one hour. Daylight Savings Time ends on Sunday, November 1 at 2 a.m. when the clocks in these jurisdictions are turned back one hour.
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• #### Q:What are some good resources that convert standard clocks to military time?

A: Good resources that convert 12-hour standard clocks to 24-hour military time include CalculateHours.com, OnlineClock.net and EasySurf.cc. In addition to providing calculators that convert standard and military time, CalculateHours.com and OnlineClock.net also provide explanations of military time and give instructions so that users can convert to military time themselves.
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• #### Q:Where do you find the official correct time of day to set a clock?

A: Official U.S. time from the Master Clock at the U.S. Naval Observatory is posted by zone on the Navy's time service website. This time is used by the Department of Defense and GPS Network. The exact time is also available at the National Institute of Standards and Technology website.
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• #### Q:What is 13:00 in regular time?

A: The time 13:00 in military time translates to 1:00 P.M. in regular time. Military time is based on 24 hours instead of 12 hours that regular time uses.
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• #### Q:How does a clock system work?

A: Analog and digital clocks work by using a power source to create regular vibrations. The vibrations are converted into electrical energy and then mechanical energy, which drives the gears and hands of the clock.
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• #### Q:Which directions does the sun rise and set in?

A: In general, the sun rises in the east and sets in the west because of the Earth's eastward spin. However, depending on where the observer is in relation to the equator and the time of year, the sun rises and sets either to the north or to the south of due east and due west. In fact, it is only on two days, the spring and fall equinoxes, that the sun rises due east and sets due west.
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• #### Q:How does a sun dial work?

A: A sun dial works by casting a shadow that is determined by the sun's position in the sky. Sun dials come in a variety of styles and shapes. Cheap, mass-produced sun dials often have design flaws that prevent them from accurately showing the time.
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• #### Q:When does daylight saving time take effect?

A: In the United States, daylight saving time takes place on the second Sunday in March at 2:00 a.m. The actual date varies each year. The United States returns to standard time on the first Sunday in November.
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• #### Q:How do you convert the 24-hour clock into military time?

A: The simplest way to convert civilian a.m./p.m. time to military time is to add 12 to every hour after 12 p.m. For example, 4 p.m. becomes 1600 hours. All a.m. hours are unchanged but have an "O" prefix and "hundred hour(s)" suffix instead of the typical "o'clock."
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• #### Q:When were clocks changed last 2014?

A: The last time Americans changed the clocks in 2014 was on Sunday, Nov. 2, at 2 a.m., when they were set one hour back. This officially ended daylight saving time that had begun on March 9. Clocks were set one hour ahead at that time.
Filed Under:
• #### Q:How many minutes of daylight do we lose each day after June 21st?

A: After the summer solstice, when days are at their longest, each day starts to become shorter by about one minute every three days. However, this process accelerates and decelerates slightly depending on the particular day.