jubilee
The Jubilee Year, according to the Hebrew scriptures, comes every fifty years. Slaves are to be freed, debts annulled.
In the Catholic tradition a Jubilee Year offers remission from the consequences of sin.
From Leviticus 25:10-13: "You shall sanctify the 50th year and proclaim freedom throughout the land for all its inhabitants; it shall be the Jubilee year for you, you shall return each person to his ancestral heritage and you shall return each to his family. It shall be a Jubilee Year for you - the 50th year - you shall not sow, you shall not harvest its after-growth and you shall not pick what was set aside of it for yourself. For it is a Jubilee Year, it shall be holy to you; from the field you eat its crop."