The reason that the time between sunrise and sunset gradually increases from late December until late June in the northern hemisphere is that the portion of the northern hemisphere that is illuminated by the sun gradually increases during that time from a minimum of about 37% to a maximum of about 63% due to the relationship between the direction of the tilt of the Earth's rotational axis and the direction of the sun.
In most of the United States and Canada, Daylight Saving Time is from the 2nd Sunday of March to the 1st Sunday of November, and Standard Time is from the 1st Sunday of November to the 2nd Sunday of March.
Chicago is on Daylight Saving Time from 0800 UTC of the 2nd Sunday of March until 0700 UTC of the 1st Sunday of November.
The amount of daylight on August 1st will depend on where you are in the world. In Indiana on August 1st, there will be 14 hours and 10 minutes of daylight, which will translate to 850 minutes of daylight.
Daylight Saving Time starts on the second Sunday of March and ends on the first Sunday of November in the Eastern Daylight Time (EDT) zone. During this period, clocks are set forward one hour in the spring and set back one hour in the fall.
UTC - 4 hours (Eastern Daylight Saving Time) from the 2nd Sunday of March to the 1st Sunday of November UTC - 5 hours (Eastern Standard Time) from the 1st Sunday of November to the 2nd Sunday of March
In 2011, Syria begins Daylight Saving Time on March 1 - set your clock(s) forward one hour at 1:00 AM. It ends on October 28 - set your clock(s) back one hour at 2:00 AM.
From the 2nd Sunday of March until the last Sunday of March, Jersey is five hours ahead of Central Daylight Saving Time. From the last Sunday of March until the last Sunday of October, Jersey is six hours ahead of Central Daylight Saving Time. From the last Sunday of October until the 1st Sunday of November, Jersey is five hours ahead of Central Daylight Saving Time. From the 1st Sunday of November until the 2nd Sunday of March, Jersey is six hours ahead of Central Standard Time.
The time in Houston is Central Daylight Saving Time (CDT; UTC - 5 hours) from the 2nd Sun. of March to the 1st Sun. of Nov. and Central Standard Time (CST; UTC - 6 hours) from the 1st Sun. of Nov. to the 2nd Sun. of March.
Daylight saving time was first observed in Michigan in 1918 as part of a nation-wide effort during World War I to conserve energy. Though it was repealed after the war, it was reinstated during World War II and has been in effect intermittently since then.
UTC - 4 hours (Eastern Daylight Saving Time, EDT) from the 2nd Sunday of March to the 1st Sunday of Nov. UTC - 5 hours (Eastern Standard Time, EST) from the 1st Sunday of November to the 2nd Sunday of March.
The time in Orlando is Eastern Daylight Saving Time, UTC - 4 hours, from the 2nd Sunday of March to the 1st Sunday of November and Eastern Standard Time, UTC - 5 hours, from the 1st Sunday of November to the 2nd Sunday of March.
Cuba has only one time zone, but they observe Daylight Saving Time. Cuba Standard Time = UTC - 5 hours Cuba Daylight Saving Time = UTC - 4 hours Daylight Saving Time in Cuba begins on the 2nd Sunday of March and ends on the 1st Sunday of November.