1. On March 20, 1775, the New Hampshire Provincial Congress passed resolutions declaring their support for Massachusetts in the wake of the British government's harsh response to the Boston Tea Party. These resolutions affirmed the colonists' commitment to defending their rights and liberties against British tyranny.

2. In 1833, the New Hampshire State Legislature established Dartmouth College as a nonprofit corporation, settling a longstanding dispute over the college's governance. This landmark decision helped establish the legal precedent that private institutions of higher education were subject to state regulation.

3. March 20, 1895, marks the birth of Dorothy E. Kelley, a pioneering educator and advocate for women's rights. Kelley served as the first female president of Keene State College and helped transform it from a small teacher training school into a comprehensive liberal arts institution.

4. On March 20, 1929, the New Hampshire House of Representatives passed a bill legalizing marijuana for medical purposes. This early experiment with medical marijuana was short-lived, as the law was soon repealed due to concerns about abuse and addiction.

5. March 20, 2007 was a significant day in New Hampshire's political history, as it marked the first official presidential campaign visit by Barack Obama. The future president spoke to a packed house at the New Hampshire Institute of Politics, laying out his vision for a more inclusive and progressive America. His visit helped solidify his status as a serious contender in the 2008 Democratic primary race.