Forever.
The Earth rotates around the Sun(once each year), not the other way around.
27.3 Days
One year
Mars does not rotate around the Earth. It rotates on its axis, and it revolves around the Sun, just as all the other planets do.
It Takes One Day for the earth to rotate on its axis.
248 earth years
11 Earth years
687 earth days
29.5 earth years
224.7 earth days
11 Earth years
27.2 days (rounded)
27 1/2 days.