Using the rules that are outlined on the links (so many answers clearly show they didn't bother to click and read these rules which is only epidemic here on GLP since so few actually read before they post).

1. Time of Christ, if He did exist, the Sermon on the Mount.

2. Anytime during the building of the Pyramids of Giza, more specifically the Great Pyramid. I would like to see just how they did build it.

3. My own birthday - I would like to see how that actually went down. The details of my birth are conflicting. My mother claims I came out backwards and 'ripped her innards out' on my way out.

My Grandmother claims I came out normally and my mother was a liar.