BRAD Pitt is not sharing the specifics of his ‘Save the Date’ card --but he says that his wedding day to Angelina Jolie is not too far off, especially if their six children have anything to say about the subject."I am getting more pressure from my kids, and it is something I want to do within their lifetime, but I also feel like the time has come,” Pitt said Monday night at the premiere of his new drama, ‘Killing Them Softly’, in New York.Pitt, 48, and Jolie, 37, have been engaged since this spring but have been together for more than seven years. They have six children together: Maddox, 11, Pax, 8, Zahara, 7, Shiloh, 6, and twins Knox and Vivienne, 4. But as for how soon is "soon,” Pitt told Extra he didn’t know (or at least wouldn’t say): "We really don’t [have a date],” the actor said. "I don’t know what’s going to happen in two weeks. I certainly don’t know what the New Year is going to bring!” Extra