On January 6th:

 1066  Harold II is Crowned King of England

On January 6th, 1066, Harold II was crowned the King of England, following the death of Edward the Confessor. His reign would be short-lived, leading to the pivotal Battle of Hastings later in the year.

 1838  Samuel Morse Demonstrates the Telegraph

A groundbreaking moment in communication occurred on January 6th, 1838, as Samuel Morse demonstrated the telegraph for the first time. This invention revolutionized long-distance communication.

1941  Franklin D. Roosevelt Delivers his “Four Freedoms” Speech

On this day in 1941, President Franklin D. Roosevelt delivered his famous “Four Freedoms” speech during his State of the Union address. The speech outlined the essential freedoms people everywhere should enjoy.