quarter-century (noun)

1. The quarter-century anniversary of the iconic building was celebrated with a grand renovation and redesign of the interior space.

2. The film showcased the evolution of society over a quarter-century through the lives of its characters.

3. The comic series spanned a quarter-century, depicting the adventures and growth of the superhero and their allies.

4. The horror novel explores the haunting events that occurred in a small town over a quarter-century, leaving its residents in perpetual fear.