HN title dates refer to the date of the article, not the event it covers. A 2019 article about an event on earth in 4000BC would still get (2019). But please d

HN title dates refer to the date of the article, not the event it covers. A 2019 article about an event on earth in 4000BC would still get (2019). But please do ignore the people confusing the delay in seeing distant events with relativistic simultaneity. It definitely did happen already in our reference frame. Just think of all astronomical events as being implicitly timestamped by observation time, not actual time. After all, distance is hard to measure in space, which means observation time is the more solid reference point.