1. On January 25, 1843, the Baltimore & Ohio Railroad Company inaugurated the world's first regular steam-powered passenger train service between Baltimore, Maryland and Ellicott's Mills (now Ellicott City). This marked a major milestone in the development of transportation in Maryland and the United States.

2. In 1893, on January 25, the Maryland state legislature passed a bill that established a new state flag. The flag features the coat of arms of the Calvert and Crossland families, who were influential in the early history of Maryland.

3. The city of Annapolis, Maryland, was founded on January 25, 1649. Originally known as Providence, the city became the capital of the colony of Maryland in 1694 and remains the capital of the state to this day.

4. On January 25, 1938, the famous jazz musician and bandleader Chick Webb played his final performance at the New York Savoy Ballroom. Webb, who was born in Baltimore, was a pioneer of the swing era and had a significant impact on the development of jazz music in the 1930s and 1940s.

5. On January 25, 2012, Maryland became the eighth state in the United States to legalize same-sex marriage. The law went into effect on January 1, 2013, and marked a significant victory for the LGBTQ+ community in Maryland and throughout the country.