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The 9th century BC refers to the period from 900 to 801 BC, the ninth hundred-year span of years before the birth of Christ. This era matters because it was a time of significant developments in human history, including the rise and expansion of major civilizations, important changes in technology and culture, and the establishment of societies whose influences would shape the world for centuries to come.
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The 9th century BC started the first day of 900 BC and ended the last day of 801 BC. It was a period of great change for several civilizations. In Africa, Carthage is founded by the Phoenicians. In Egypt, a severe flood covers the floor of Luxor temple, and years later, a civil war starts.
It is the beginning of the Iron Age in Central Europe, with the spread of the Proto-Celtic Hallstatt culture, and the Proto-Celtic language.