This is the 1186th most frequent German word.
jubiläum
"Jubiläum" means "anniversary" in English.
Here, 'Jubiläum' refers to the couple's wedding anniversary.
Das Paar lud Freunde und Familie ein, um ihr 25-jähriges Jubiläum zu feiern.
The couple invited friends and family to celebrate their 25th anniversary.
'Jubiläum' in this instance pertains to the anniversary of the city's establishment.
Die Stadt organisierte ein Festival zu Ehren des Jubiläums ihrer Gründung vor 100 Jahren.
The city organized a festival in honor of the anniversary of its founding 100 years ago.
In this sentence, 'Jubiläum' is used to denote the anniversary of the company's founding.