This instructable lists a few, but not all of the mathematical projections you will need to take into account before you set off on your trip across time.
Step 1: First, you need to know where you are going.
If you just pop back in time, without moving in space, you'll wind up on the other side of the sun from where you want to be. Due to the Earth being in a different place on Nov 14th
The Earth spins counterclockwise at approximately 1675km per hour, looking down from the north pole.
The distance from the Earth to the Sun changes due to it being in an Elliptical orbit. The Average distance is 149.6 million km with the Perihelion (shortest distance) being on January 3rd 147,300,000 Km, and the Aphelion (longest distance) being 152,100,000 km on July 4th.
You'll need to find a way to move through the Suns gravity well to the point where the Earth was before.