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# How many hours of daylight are there in a day during summer?

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The number of daylight hours on a summer day depends upon latitude and can vary from slightly more than 12 hours to a full 24 hours in the northern hemisphere. At any given latitude above the equator, the longest day falls on the summer solstice, which is usually June 21.

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The Earth does not face the sun at equal amounts throughout the year because it tilts at an angle of 23.5 degrees. This results in the sun being visible longer in the Northern hemisphere when the North Pole tilts towards it. During the summer solstice, the sun reaches its highest point in the Northern hemisphere's sky and is at its lowest during the winter solstice. The farther north one travels, the longer the day gets. However, the opposite is true at the other pole. When the Arctic Circle experiences 24-hour days, the Antarctic never sees the sun.

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## Related Questions

• A:

In the United States, daylight savings time (DST) commences on the second Sunday in March and ends the first Sunday in the month of November, states the Old Farmer's Almanac. On the specified date in March, the clocks are set 1 hour ahead at 2:00 a.m., and clocks are revert 1 hour back at the same time in November on the indicated day. However, DST in other countries can occur on different dates.

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• A:

To convert military time to the standard 12-hour clock, subtract 12 hours from any time shown in double digits. Using this system, 13:00 is 1 p.m. and 23:00 is 11 p.m. for times between 1 and 11:59, the number stays the same and it is in the am; for those between 12 and 12:59, the number stays the same and it is in the pm. Midnight on the 24-hour system is considered to be 00:00.

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To convert standard time to military time, add 12 hours to times after 12 p.m. and remove the punctuation. Military time runs on a 24-hour system without punctuation, while standard time uses a 12-hour system and a colon to separate hours and minutes.