Quasquicentennial
The term being used most often for the 125th community celebration
An 150 year celebration is called a Sesquicentennial celebration
It is called a "centennial celebration"
A 100 year celebration is called a centennial celebration.
60 year celebration
An 150 year celebration is called a Sesquicentennial celebration
55th wedding celebration is Emerald.
Centennial
It is called Centenary.
A 175-year celebration is typically referred to as a "175th anniversary" or "175th celebration." Such milestones often involve special events or commemorative activities to honor the history and achievements of the organization or entity being celebrated. In some contexts, it might also be informally called a "quasquicentennial," though this term is more commonly used for 125 years.
An Emerald anniversary
Diamond Jubilee
Diamond Jubilee