Decades

A decade is a period of ten years. It helps organize history, trends, and long-term changes by grouping years together. For example, the 1990s refers to the years from 1990 to 1999. Decades are useful for understanding cultural shifts, technological advancements, and significant events within a specific timeframe. They are a common way to analyze and discuss history without focusing on individual years, providing a broader perspective on social and historical developments over extended periods.