Comment by freework

There is something about this article that kind of annoys me. It's my understanding that back in the year 1006, the entire world was not using the same calendar. Each of these observations would not have been recorded as simply "May 1, 1006", they would have been in each observer's respective calendar... Yet this article just states them as being recorded on the same day using the Julian/Gregorian calendar format that we use today. I would have liked the article to go into more detail about how they were able to sync up the dates across the various calendar systems.