Changes

* '''[[May 14|May 14–15]]''': The major May 1921 geomagnetic storm occurs. <br> The three-day storm was caused by the impact of an extraordinarily powerful coronal mass ejection on [[Earth]]'s magnetosphere. It was the most intense geomagnetic storm of the [[20th century]]. <br> The storm's electrical current sparked a number of fires worldwide, and was extensively reported in New York City, which was a center of telegraph activity as a railroad hub.

* '''[[July 29]]''' – Adolf Hitler becomes Führer of the Nazi Party in [[Germany]].

{{| class="wikitable" style="width:20%"! colspan="3" | [[Timeline]] |-| <center>[[1920]] || <center>[[1921]] || <center>[[1922]] |-  [[category:timeline nav}}]]