[baudrunner]

To decipher further your comment Dave, I would suggest that the actual difference in time is insignificant and inconsequential. That is one of the disappointments of relativity. Even though these phenomena are very real, they are only barely measurable, and in actual fact temporally inconsequential to the ongoing process of being. The suggestion that we could invent a time tunnel that takes us to past historical events or far into the future is pure sci-fi. Too bad.

The nature of space-time is such that temporal inconsistency is the rule throughout the cosmos. But it is no big deal. Even travelling through vast swaths of it will require barely noticeable corrections and accommodations to relative fixed points along the journey. Jet lag is more noticeable.