Historical decades are periods of ten years that help us categorize and understand significant events, cultural shifts, and societal changes. Each decade often has its own defining characteristics, such as the Roaring Twenties, known for economic prosperity and cultural dynamism, or the Great Depression of the 1930s, marked by economic hardship. These decades can also reflect technological advancements, like the 1960s, which saw the rise of space exploration with the Apollo 11 moon landing. By studying these time frames, historians can analyze trends and patterns that shape our world today, providing context for contemporary issues.