They've been converging for the past week or so and, tonight, Venus, second planet from the Sun and second brightest object in the night sky, will be within half an angular degree of Mars, fourth planet from the Sun. To see the pair, simply go out in the predawn hours and look East. Venus? It's the brightest thing in the sky. Venus found, that dim, reddish 'star' right next to it is, in fact, Mars.
If that weren't enough, the Moon is also at Third Quarter phase today, too.