My immediate answer would be the past. However, we've shown messing with quantum entanglement can change results of a past experiment.
Maybe the distant past, but I don't think physicists will agree on that one either.
Anyway, I am frustrated with the God answers. Regardless if you believe in a God or not, peoples' interpretation of any sacred text changes. In the past, some Christians put homosexuals to death. Today, some condone it.
You might argue that God himself never changes, but "sacred texts" would indicate otherwise. In the Bible, for example, God of the old testament is very much different than the new. I know I'm not going to change anyone's mind. I just wanted to voice my frustration.