I always pictured Australia behind us for some reason.
Perhaps culturally. But when it comes to time, we are ahead. The thing that makes the difference is the international date line. It runs down the Pacific ocean. Time 'starts' from there and moves west (with the sun). The line is like the time 'starting point' and after the line (on the west side) we get hit by the sun first, so we are ahead of you. Time (and the sun) hits your east coast before your west coast, so it is earlier in your east than it is in your west.
Since the Earth is a ball what is east and what is west is relative. If you stand in San Francisco you'd probably say that Philadelphia is to your east. But if you go round the long way it is to your east - that is, if you travel east or west, you will eventually get to Philadelphia from San Fran. It will just take longer if you go west to get there.