1. Birth of John Hanson: On October 13, 1715, John Hanson, the first President of the United States under the Articles of Confederation, was born in Mulberry Grove, Maryland. Hanson's presidency lasted from 1781 to 1782 and he played a vital role in shaping the country during its early years.

2. Battle of Antietam: On October 13, 1862, the Battle of Antietam took place near Sharpsburg, Maryland. It was the bloodiest single-day battle in American history, with over 23,000 casualties. The Union emerged victorious and the battle is considered a turning point in the Civil War.

3. Maryland's Ratification of the Articles of Confederation: On October 13, 1780, Maryland became the last state to ratify the Articles of Confederation. The Articles served as the first constitution of the United States and were the governing document for the country from 1781 to 1789.

4. The Maryland Renaissance Festival: The Maryland Renaissance Festival, one of the largest and longest-running Renaissance fairs in the country, takes place annually from late August to mid-October. October 13, 2019 marked the final day of the festival's 43rd season.

5. Record High Temperature: On October 13, 2018, Baltimore-Washington International Airport recorded a high temperature of 85 degrees Fahrenheit, tying the record for the warmest October 13 on record. Maryland is known for its beautiful fall weather, but it seems Mother Nature had other plans that day.