1. Derby Day: May 1 is a big day in Kentucky because it's the day of the Kentucky Derby, also known as the "Most Exciting Two Minutes in Sports." The first Kentucky Derby took place in Louisville on May 17, 1875, and the event has been held on the first Saturday in May ever since.

2. Derby traditions: The Kentucky Derby is known for its traditions, including the singing of "My Old Kentucky Home" before the race, the mint julep drink, and the garland of roses presented to the winning horse. There's also a fashion tradition of wearing big, colorful hats to the event.

3. Labor Day: May 1 is also known as Labor Day in many countries around the world, honoring the contributions of workers. In Kentucky, Labor Day is celebrated on the first Monday in September.

4. Historic events: Interestingly, May 1 has been the date of some significant events in Kentucky history. In 1865, Union troops entered and occupied Louisville during the Civil War. In 1926, the Great Miami Hurricane caused severe flooding in Kentucky and other states. And in 1937, the Ohio River flood affected Kentucky and several other states, causing widespread damage and loss of life.

5. State symbols: May 1 is the perfect time to celebrate some of Kentucky's state symbols, which include the Kentucky state flower (goldenrod), state tree (tulip poplar), and state bird (northern cardinal). Kentucky is also famous for its bourbon whiskey, which is produced in the state's many distilleries.