In this article. Body dysmorphic disorder (BDD) is a distinct mental disorder in which a person has symptoms of a medical illness, but the symptoms cannot be fully explained by an actual physical disorder. People with BDD are preoccupied with an imagined physical defect or a minor defect that others often cannot see.DD is a chronic (long-term) disorder that affects men and women equally. It usually begins during the teen years or early adulthood. The most common areas of concern for people with BDD include: 1  Skin imperfections: These include wrinkles, scars, acne, and blemishes.
Four standard time zones for the continental United States were introduced at noon on November 18, 1883, when the telegraph lines transmitted time signals to all major cities.
What is the time zone in New York? There are four time zones in the continental United States. From east to west, they are Eastern, Central, Mountain and Pacific. Each time zone is measured as a variant of the GMT, which is measured from the Greenwich Meridian at England's Greenwich Observatory. Astronomers declared this to be the prime meridian at a conference held in 1884.