1. On January 6, 1912, New Hampshire became the ninth state to ratify the 16th Amendment to the U.S. Constitution, which established the federal income tax. This move was seen as a crucial step in funding the federal government and its programs.

2. January 6, 1955 marked the opening of the Mount Washington Observatory, located at the summit of Mount Washington. The observatory conducts scientific research, monitors weather patterns and collects data, making it a valuable resource for meteorologists and scientists.

3. In 1985, January 6 was declared "Governor's Day" by then-Governor John Sununu, in recognition of the state's chief executive. This day continues to be honored each year by the current governor.

4. On January 6, 1997, New Hampshire's House of Representatives elected its first woman Speaker. This historic moment saw Republican Donna Sytek take on the role, which she held until 2000.

5. January 6, 2004, was a noteworthy day in New Hampshire history as it marked the swearing-in of the state's first female Attorney General, Kelly Ayotte. She went on to become a U.S. Senator, serving from 2011 to 2017.