The BBC has launched a trial site called The Time When which is "a place to record and share memories of the important days in your life."
It also gives information about events which have taken place on any day since 1st January 1900, and on many dates before that.
One of the first entries I came across was First radio.
My father bought our first radio receiver which appeared as a flat box with tuner and volume on top.
Which set off a train