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Washington, D.C., is located in the humid subtropical climate zone (Köppen climate classification: Cfa), exhibiting four distinct seasons. [11] Its climate is typical of the mid-Atlantic states. The District is located in USDA plant hardiness zone 8a near downtown, and zone 7b elsewhere in the city, indicating a temperate climate. [12]
Link - An alternative name (alias) which links to a canonical zone. Link † - A standard Link (as above). The dagger symbol (†) signifies that the zone was canonical in a previous version of the database. Historical data for such zones is still preserved in the source code, but it is not included when compiling the database with standard ...
A later version of Washington mean time based on the meridian of the clock room at the exact center of the New Naval Observatory (77°4′2.24″W or GMT − 5 h 8 m 16.15 s) was still being used in 1950 on a few pages of the American Ephemeris and Nautical Almanac, even though most of its pages used Greenwich Civil Time, the American name for ...
In 1870, Charles F. Dowd published a pamphlet titled A System of national time and its application advocating three time zones across the country based on the Washington meridian, modifying this to four zones based on the Greenwich meridian in 1872.
The Washington metropolitan area, also referred to as the D.C. area, Greater Washington, the National Capital Region, or locally as the DMV (short for District of Columbia, Maryland, and Virginia), is the metropolitan area comprising Washington, D.C., the federal capital of the United States, and its surroundings.
Map of U.S. time zones with new CST and EST areas displayed. Some U.S. time zones, such as the Samoa Time Zone, are not on this map. This is a list of the time offsets by U.S. states, federal district, and territories. For more about the time zones of the U.S. see time in the United States. Most states are entirely contained within one time zone.
This is a list of time zone abbreviations. ... Greenwich Mean Time (GMT) :: UTC : Archived 2013-05-08 at the Wayback Machine; MHonArc Resources: TIMEZONES;
The Washington meridians are four meridians that were used as prime meridians in the United States which pass through Washington, D.C. The four that have been specified are: through the Capitol; through the White House; through the old Naval Observatory; through the new Naval Observatory. Their longitudes may be reported in three ways: