2/19/2024 0 Comments Est time zone mapOn June 21, 2018, sunrise was at 5:39am Eastern Daylight Time at Chincoteague. 2īecause of that difference, on the longest day of the year the sun shines on the eastern edge of Virginia about 37 minutes earlier than on the western tip. The longitude at the eastern edge of Assateague Island on the northeastern corner of Virginia is -75.2861889°, while the longitude at Cumberland Gap is -83.6756599°. The width of Virginia is reflected by the difference in longitude. Those workers may be the most aware that the sun is located at a different place of the sky at any time of the day in eastern vs. Some people, including construction workers and farmers, set their work schedules to start at daylight or end at dusk. The US Department of Transportation determines when Virginians will set their clocks to "spring forward" and "fall back" to maximize the hours of daylight in the summer when people are active. The state follows Daylight Savings Time as established in the Uniform Time Act of 1966. Greenwich Mean Time (Zulu time) served as the basis for "standard time" in Virginia until the switch in 1972 to Coordinated Universal Time based on atomic clocks. After the International Meridian Conference in 1884, the United States defined the "prime meridian" for longitude and timekeeping based on the location of the Greenwich Observatory. Since time was standardized in the United States on November 18, 1883, all of Virginia has been within the Eastern Time Zone.Įach time zone covers roughly 15°'s of longitude. Source: US Geological Survey (USGS), National Map - Standard Time Zones Page Go to NASA Lunar Eclise Page Go to NASA Planetary Transit Page Go to NASA Eclipse Resource PageĮmail: NASA Representative: Robert M.In the Eastern Time Zone In the Eastern Time ZoneĮven Cumberland Gap is well within the boundaries of he Eastern Time Zone Through Time - National Institute of Standards and įor more information on time reckoning and time zones, check out To convert any eclipse predictions from UT to local time (i.e. Will see that your local time is 5 hours earlier than UT. Once noted, use this number to convert all eclipse prediction timesįor example, if you are in the Eastern Standard Time zone, you How many hours different your local time is from Universal Time. The official source of time used in the United States is the In order keep it in sync with UT (which varies due to Earth's Occasionally, a "leap second" is added to UTC Is synchronized and adjusted to stay within 0.9 seconds of Just remember that you'll need toĬheck with your travel agent or with a guide book to find out if Daylight Saving Time is practicedĬoordinated Universal Time (or UTC) is based on atomic time. Zone Map courtesy of HM Nautical Almanac Office, Time zones for countries around the world can be determined with So the eclipse will begin at 16:25 (=4:25pm) local time. Saving Time in June, we must ADD one more hour to the above Pacific Standard Time (PST) = UT - 8 hoursĮffect in the time zone, you must ADD one hour to the aboveįor example, let's assume that an eclipse begins in Toledo, Ohio Mountain Standard Time (MST) = UT - 7 hours For North Americans, the conversion from UT to local time is as follows:Ītlantic Standard Time (AST) = UT - 4 hoursĮastern Standard Time (EST) = UT - 5 hoursĬentral Standard Time (CST) = UT - 6 hours In order to convert eclipse predictions from UT to local time, you need to know what time zone you are in. Like most other astronomical calculations, eclipse predictions are usually presented in terms of Universal Time. It's also approximately equal to mean solar time from Greenwich. Universal Time is actually based on the mean sidereal time as measured in Greenwich, England. Although their exact definitions differ, most readers can assume that Universal Time is equivalent to Greenwich Mean Time or GMT. Universal Time or UT is the precise measure of time used as the basis for all civil time-keeping. Finally, we can measure time through the oscillations of atoms (International Atomic Time). Or we can measure time based on the rotation of Earth on its axis with respect to the stars (Universal Time). For instance, we can measure the passage of time via the orbital motion of Earth and other planets in the solar system (Dynamical Time). Time can be measured in a number of ways.
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