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.
This is a list representing time zones by country. Countries are ranked by total number of time zones on their territory. Time zones of a country include that of dependent territories (except Antarctic claims). France along with the United States, including its overseas territories, has the most time zones with 12. Many countries have daylight saving time, one added hour during the local summer, but this list does not include that information. The UTC offset in the list is not valid in practice during daylight saving time.