The 40th century BC
3 recorded events across 1 year of the 40th century BC, 4000 BC to 3901 BC. The largest categories are exploration & discovery (3).
Open the 40th century BC on the interactive map →
Busiest years
Every year in the 40th century BC
Years with no recorded events are omitted. The number is how many events are dated precisely to that year; entries known only to a century or decade are listed on the year page separately.