1. On February 25, 1837, the Baltimore & Ohio Railroad Company inaugurated its first passenger train service in Maryland. The locomotive, named "The Pioneer," departed from Baltimore and arrived in Ellicott's Mills (now Ellicott City), marking the beginning of a new era of transportation in the state.

2. In 1861, on February 25, Maryland's Governor Thomas Holliday Hicks called a special session of the Maryland General Assembly to address the state's neutrality in the American Civil War. The session was held in Frederick, Maryland, and resulted in the passage of a resolution supporting the Union.

3. On February 25, 1882, the Chesapeake & Ohio Canal Company officially surrendered its property and rights to the United States government. The canal had been in operation for over 74 years and was a major transportation route for goods and people in Maryland.

4. In 1933, on February 25, the Maryland State Police was established by Governor Albert C. Ritchie. The force was created to combat the rising crime rates in Maryland, and today, the Maryland State Police is one of the largest police agencies in the state.

5. On February 25, 2013, the Maryland Senate passed a bill legalizing same-sex marriage in the state. The bill was later signed into law by Governor Martin O'Malley, making Maryland the eighth state to legalize same-sex marriage in the United States.