Yes, a period of 50 years is referred to as a semi-centennial. The term "centennial" refers to a 100-year anniversary, so "semi-" indicates half of that duration. Therefore, a semi-centennial marks the completion of 50 years.
Semicentennial.
Semi-centennial means once every half-century.
A period of 50 years is commonly referred to as a "semi-centennial" or "golden jubilee." In various cultures and contexts, it may also be celebrated as a significant milestone, marking half a century of an event, organization, or relationship. The term "quinquagenary" can also be used to describe this 50-year span.
Half a century. A time period of 50 years.
That's the bicentennial half, not centennial. It's an extremely common coin, still worth 50 cents.
Centennial means 100. If it is an anniversary, then 100 years. Remember that there are 100 cents (commonly called pennies) in one dollar.
25-125 usd
A centennial happens every 100 years on that specific day every 100 years. It's the 100th anniversary of something.
50-500 usd
A 250-year anniversary is called a semiquincentennial. This term combines "semi," meaning half, and "quincentennial," which refers to a 500-year celebration. Thus, a semiquincentennial marks a quarter of a millennium.
The word centennial refers to one hundred years. A centennial version of a book is an edition which is released one hundred years after the first publication to commemorate or celebrate the book.
The library recently celebrated its centennial, having been open for one hundred years.