1. On December 18, 1774, a group of Patriots gathered in Portsmouth, New Hampshire for a Provincial Congress. During this meeting, they voted to send a delegation to the Continental Congress in Philadelphia to express their grievances against British rule.

2. In 1812, the first issue of The New Hampshire Patriot and State Gazette was published in Concord. It became the state's leading newspaper and remained in publication until 1907.

3. On December 18, 1867, the first railroad bridge across the Connecticut River was completed, connecting White River Junction, Vermont and Wells River, New Hampshire. This bridge played a crucial role in the development of transportation and commerce in the region.

4. In 1927, the first ski school in the United States was established at the Dartmouth Outing Club in Hanover, New Hampshire. Over the years, the school has taught thousands of students, including many Olympic athletes.

5. On December 18, 1956, the Dartmouth Time Sharing System (DTSS) was used for the first time, one of the earliest computer operating systems. DTSS allowed multiple users to access the same computer simultaneously, paving the way for modern computer networking.