Wiktionary
pastward
a. Into the past; moving backwards in time. adv. Into the past; moving backwards in time.
Usage examples of "pastward".
A good many sections of Exhibit B dealt with instances more recent, though still well outside the 1979 date that had been considered the extreme limit of pastward travel.
My time-reversal project had become more experimental than theoretical by this time, since I had moved through the stages of early hypotheses and now was spending most of my time at the giant particle accelerator, trying to build up the forces that I hoped would send fragments of atoms flying pastwards.