1. Nebraska became a state in 1867, and it did not have any leap years until 1872. That is because February 29 was skipped in 1868, 1870, and 1871, as there were no legal requirements to have a leap year at the time.

2. In 1892, Leap Year Day was celebrated in Nebraska in a unique way. A woman named Amy Crocker, who was known as the "Queen of the Leap Year," proposed to a man named James O'Neill. He accepted, and on February 29, 1892, the couple was married in a grand ceremony in Omaha.

3. In 1904, an unusual event took place in Nebraska. The state legislature passed a law that allowed women to propose to men on Leap Year Day. The law stated that if the man refused the proposal, he had to pay a fine or buy the woman a gift. However, the law was repealed in 1945.

4. In 1960, Nebraska saw a rare occurrence on Leap Year Day. A total solar eclipse took place on February 29, which was visible from certain parts of the state. The eclipse lasted for around 4 minutes and was a spectacular sight for the residents of Nebraska.

5. In 2012, a group of students from the University of Nebraska-Lincoln celebrated Leap Year Day by attempting to set a world record for the largest game of leapfrog. They gathered over 1,300 people on the university's campus and broke the previous world record of 351 participants.