jubilee
Definitions
A special anniversary of an event, especially one celebrating twenty-five, fifty, or sixty years of a reign or activity.
A season or occasion of joyful celebration or rejoicing.
A period of time, originally every fifty years, in which debts were forgiven and slaves were liberated.
Examples
The entire nation celebrated the queen's silver jubilee with parades and fireworks.
After years of hard work, the company announced a special jubilee to honor its founding employees.
Synonyms
celebration festivity commemoration gala festival rejoicing carnival