The current name for this day did not come into use until after World War II. Decoration Day and then Memorial Day used to be held on May 30, regardless of the day of the week, on which it fell. In 1968, the Uniform Holidays Bill was passed as part of a move to use federal holidays to create three-day weekends. This meant that that, from 1971, Memorial Day holiday has been officially observed on the last Monday in May. However, it took a longer period for all American states to recognize the new date.
by Jerry Coffey on June 17, 2008. The orbit of Jupiter, like that of all the planets, is elliptical instead of circular. At perihelion(closest approach) Jupiter comes within 741 million km, or 4.95 astronomical units(AU), of the Sun.t its most distant point, called aphelion, Jupiter is 817 million km, or 5.46 AU from the Sun. The average between perihelion and aphelion is called the semi-major axis. Jupiterâs semi-major axis is 778 million km, or 5.2 AU.
If it were moving at the same spe â¦ ed as Earth in its orbit, it would take 5 times as long to orbit the Sun. But planets farther from the Sun actually orbit more slowly with increasing orbital distance, so Jupiter actually takes nearly 12 Earth years to make one orbit (Jupiter year).  (Earth's orbital speed is about 30 km/sec. For Jupiter it is about 13 km/sec.).