1. On January 28, 1788, New Hampshire became the ninth state to ratify the United States Constitution, making it officially a part of the newly formed nation.

2. On January 28, 1825, the Concord Railroad in New Hampshire was established, providing a vital transportation link between Concord and Boston.

3. On January 28, 1896, Dartmouth College in Hanover, New Hampshire hosted the first-ever official winter sports competition in the United States, including skiing, snowshoeing, and ice skating events.

4. On January 28, 1986, Christa McAuliffe, a high school teacher from Concord, New Hampshire, was tragically killed during the Space Shuttle Challenger disaster, along with six other crew members.

5. On January 28, 2014, New Hampshire became the ninth state in the United States to legalize same-sex marriage, following a lengthy legal battle and years of legal uncertainty.