Jubilee
Particular anniversary; in the Bible, the fiftieth
A Jubilee is often used to refer to the celebration of a particular anniversary of an event, usually denoting the 25th, 40th, 50th, 60th, and the 70th anniversary. The term comes from the Hebrew Bible (see, "Old Testament"), initially concerning a recurring religious observance involving a set number of years, that notably involved freeing of debt slaves. Emperors of ancient Rome customarily marked anniversaries of their rule with celebrations, although they did not use the term jubilee. https://en.wikipedia.org/wiki/Jubilee
A Jubilee is often used to refer to the celebration of a particular anniversary of an event, usually denoting the 25th, 40th, 50th, 60th, and the 70th anniversary. The term comes from the Hebrew Bible (see, "Old Testament"), initially concerning a recurring religious observance involving a set number of years, that notably involved freeing of debt slaves. Emperors of ancient Rome customarily marked anniversaries of their rule with celebrations, although they did not use the term jubilee.
