Which year was the first year in the 5th century BC and which year was the last in this century?

The first year in the 5th century BC was 499 BC, the last year of this century was 400 BC. It is noteworthy that in 499 BC between the Greeks and the Persians, a war was unleashed, which was called the Greco-Persian Wars. During this time period, Greece was invaded by the Persian Empire. But despite the might of Persia, the Greeks were still able to defeat their opponents and defend their independence.