“Jubilee” is the name given to a particular year; the name comes from the instrument used to mark its launch. In this case, the instrument in question is the yobel, the ram’s horn, used to proclaim the Day of Atonement (Yom Kippur). This (Jewish) holiday occurs every year, but it takes on special significance when it marks the beginning of a Jubilee year.
We can find an early indication of it in the Bible: a Jubilee year was to be marked every 50 years, since this would be an “extra” year, one which would happen every seven weeks of seven years, i.e., every 49 years (cf. Leviticus 25:8-13). Even though it wasn’t easy to organise, it was intended to be marked as a time to re-establish a proper relationship with God, with one another, and with all of creation, and involved the forgiveness of debts, the return of misappropriated land, and a fallow period for the fields.
Taken from the Vatican’s dedicated website for Jubilee 2025
24 December 2024 Opening of the Holy Door of Saint Peter’s Basilica
Dec 28-9 2024 Liturgy Resource for Feast of the Holy Family & Opening of Jubilee Year
For more information from the Vatican’s Jubilee website
Diocesan Programme for Jubilee 2025