Hepatitis B virus, abbreviated HBV, is a species of the genus Orthohepadnavirus, which is likewise a part of the Hepadnaviridae family of viruses. This virus causes the disease hepatitis B.he early evolution of the Hepatitis B, like that of all viruses, is difficult to establish. The divergence of orthohepadnavirus and avihepadnavirus occurred ~125,000 years ago (95% interval 78,297â313,500). Both the Avihepadnavirus and Orthohepadna viruses began to diversify about 25,000 years ago.
Daylight Saving Time (DST) was first used in Germany in 1916. Clock in Prague, the Czech Republic. Many countries in Europe change their clocks to observe daylight saving time on the last Sunday of March each year. Pictured above is a clock in Prague, the Czech Republic's capital city.
1 In 2015 Daylight Savings Time begins Sunday March 8, 2015 at 2:00 a.m. local time. 2  Clocks will shift forward 1 hour, making the local time 3:00 a.m. 3  When Daylight Savings Time (DST) begins in the Northern Hemisphere, it is ending in the Southern Hemisphere. 4  Benjamin Franklin first proposed the idea of DST in 1784.