As of 2007, daylight time begins in the United States on the second Sunday in March and ends on the first Sunday in November. On the second Sunday in March, clocks are set ahead one hour at 2:00 a.m. local standard time (which becomes 3:00 a.m. local daylight time). On the first Sunday in November, clocks are set back one hour at 2:00 a.m. local daylight time (which becomes 1:00 a.m. local standard time). These dates were established by Congress in the Energy Policy Act of 2005, Pub.
The B complex vitamins are essential to your metabolism and the health of your body. They are not the only vitamins that you need. In addition to the eight B vitamins, you need to consume vitamins A, C, D, E and K. Together, these vitamins make up the 13 essential vitamins.
Vitamin B-9 also aids in the continual cell growth needed to give rise to new red blood cells, because it helps you metabolize proteins and DNA. A deficiency in either vitamin B-12 or vitamin B-9 can cause pernicious anemia, which can cause a rapid heart rate, weight loss, irritability and fatigue. Your diet should include 2.4 micrograms of vitamin B-12 and 400 micrograms of vitamin B-9 each day to prevent a deficiency.