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.
How Many Time Zones Are There in The World Posted by: admin Posted date: February 25, 2012 In: World | Comment : 0 | 32,034 views Currently there are 24 official time zones in the world. There are 16 others too but they are not usually taken into account in official international matters. Official time zones are divided into units of one hour each but the unofficial time zones may have 15 min, 30 min or 45 min as their base unit. Ideally speaking, there should be 24 time zones in the world but this is not the world of our dreams and there are political factors at work too!