Earthcrossing

Predating even Arrival itself, Earthcrossing is the oldest uniquely saturnite holiday. It is celebrated when the Earth transits the Sun, approximately every 274 enceladan days.

Because it originated during the Climb, and was part of the colonists finding their new identity, Earthcrossing is sometimes called a "transitional" holiday.

Observance
Though it is most often a solemn holiday, observance of Earthcrossing varies. Because of its connection with Earth and the Climb, nativist sentiments are often high during this time.

During The Climb
Historical records document that the orbitals noted the transit of the Earth, and how the time between transits lengthened as their vessel drew further in its outbound orbit. The transits served as a reminder of their increasing distance from their old home.