1. Idaho became a state on March 31, 1890. Before this date, Idaho was a territory that was established in 1863. The statehood came after years of lobbying by the people of Idaho and the politicians from the territory who worked to convince Congress that Idaho was ready for statehood.

2. On March 31, 1937, Uniontown in Idaho achieved fame when it set a world record for the longest bridge built entirely of logs. The bridge that spanned the American River was over 300 feet long and was constructed from Douglas fir logs. The bridge is no longer standing but it remains one of the most remarkable feats of engineering in Idaho's history.

3. In 1975, the US Navy launched the USS Boise, a Los Angeles-class attack submarine that was named after the capital city of Idaho. The USS Boise was an active-duty submarine that served the US Navy for more than three decades and played a vital role in many military operations around the world.

4. On March 31, 1964, a massive earthquake struck Anchorage, Alaska, triggering a deadly tsunami that also affected the coast of Idaho. Though the tsunami was relatively mild in comparison to the destruction it wrought in Alaska, it still caused significant damage and served as a warning to Idahoans about the potential dangers of living near the ocean.

5. March 31, 1913, saw the founding of Idaho's first national park, Craters of the Moon National Monument and Preserve. The park is located in the Snake River Plain and is known for its volcanic landscape, which is similar to the one found on the moon. The park boasts an impressive 750,000 visitors each year and contributes significantly to Idaho's economy as a major tourist attraction.