Most fans prefer to stay away from the sun, but when the weather gets cold for a December game in Baltimore, finding seats in the sun might keep you a couple degrees warmer than your brethren sitting in the shade.

Sections 507-515 on the Ravens seating chart
Upper level sections in the east end zone are uncovered and exposed to the sun for the longest period of time

The best seats for staying in the sun longest will be located on the 500 level upper seating tier behind the east endzone (Sections 507-515). These seats face directly west, and will have exposure to the setting sun longer than any other area of the stadium.