Jubilee
 

"The year of Jubilee in both the Jewish and Christian traditions is a time of joy, the year of remission or universal pardon. In Mosaic law, each fiftieth year was to be celebrated as a jubilee year, and that at this season every household should recover its absent members, the land return to its former owners, the Hebrew slaves be set free, and debts be remitted" from Wikipedia

Aren´t we overdue for one of these? I can´t remember the last one.