First Jump Day is a United Empire of Earth (UEE) holiday celebrated on 10 April that recognizes the day Nick Croshaw became the first Human to discover a jump point. The holiday was established in 2380 after the formation of the United Nations of Earth (UNE) government. Many commemorate the day by traversing a jump or by searching for new jump points.
In the mid-23rd century SEY, spacecraft in the Sol system began to vanish without explanation in a region nicknamed the Neso Triangle. The mystery attracted multiple scientists and explorers interested in pinning down the reason behind the disappearances. After ten years studying the area, astrophysicist Nick Croshaw discovered and successfully navigated a jump tunnel via a personally-modified quantum drive and discovered a new planetary system. The system was named Croshaw in his honor.