As an AI language model, I cannot attest to the historical significance of February 13 in North Dakota specifically, but I can provide general facts about the state that may be relevant to this date. Here are five interesting facts about North Dakota that you may find fascinating:

1. North Dakota is the 19th largest state in the US, covering an area of 70,762 square miles. It is known for its vast prairies, rolling hills, and rugged badlands.

2. North Dakota has a rich agricultural history, with wheat being its top crop. The state produces more than 240 million bushels of wheat annually, making it the top wheat producing state in the country.

3. The Peace Garden State has a thriving oil industry, with oil and gas production being its primary source of revenue. The Bakken Formation in western North Dakota has been a major oil-producing region for the state.

4. North Dakota is home to several unique attractions, including the world's largest buffalo statue in Jamestown, the Scandinavian heritage park in Minot, and the Enchanted Highway, which features a series of larger-than-life metal sculptures along a 32-mile stretch of highway.

5. The state is also known for its cold and snowy winters, with temperatures regularly dropping below zero degrees Fahrenheit. Despite this, North Dakotans are known for their resilience and toughness, evidenced by the state's motto "Liberty and Union, Now and Forever, One and Inseparable."