Time Travel

A quote from Einstein:

Since there exists in this four dimensional structure [space-time] no longer any sections which represent "now" objectively, the concepts of happening and becoming are indeed not completely suspended, but yet complicated. It appears therefore more natural to think of physical reality as a four dimensional existence, instead of, as hitherto, the evolution of a three dimensional existence.

So what was Einstein saying? Einstein proved that time is relative, not absolute as Newton claimed.

So today is relative. Oldest Daughter graduates high school.

She used to be Baby Girl. But now? There's another Baby Girl, an Oldest Son, and a Demon Baby. And today, Oldest Daughter moves on to a new adventure in life.

Time is relative. I just don't know where it goes.

Thoughts?