Abstract: I discuss the argument (put forward by Putnam and others) that special relativity is incompatible with presentism. I reject some ways (such as Stein's) to solve the problem, but suggest that the problem lies in Einstein's definition of simultaneity. I offer an alternative way of understanding and defining simultaneity and show how the Lorentz transformations are to be understood in light of it. After defending the position against possible attack, I go on to show its positive benefits.

Keywords: Putnam, special relativity, presentism, Stein, Einstein, simultaneity,