Centennial
A 100 year celebration is called a centennial celebration.
An 150 year celebration is called a Sesquicentennial celebration
It is called a "centennial celebration"
A 50-year celebration is called a "semicentennial" or "quincentenary." It marks the halfway point to a centennial, which is a 100-year celebration. The term "golden anniversary" is also commonly used to refer to a 50-year milestone, especially in the context of marriages or significant events.
60 year celebration
An 150 year celebration is called a Sesquicentennial celebration
55th wedding celebration is Emerald.
It is called Centenary.
It is called a 'quincentennial' Quin= five. Centennial= a period of 100 years.
Diamond Jubilee
An Emerald anniversary
It is a century or a centennial