4 June 1860: Eröffnung des Basler Bahnhofs. The new Centralbahnhof was opened in front of the Elisabethenbollwerk, replacing an earlier station at Lange Gasse from 1854; it would itself be replaced by the current station in 1907. See wikipedia for more information.

4 June 1980: Day of death of Leopold Kielholz. Kielholz was a Swiss football striker born in Basel, where he began his career with BSC Old Boys and later played for FC Basel, contributing significantly to the team's success. He made history as the first Swiss player to score in a World Cup during the 1934 tournament and participated in the 1938 World Cup, ultimately earning 17 caps and scoring 12 goals for the Swiss national team. See wikipedia for more information.