1680s BC - Significant people

Centuries: 18th century BC - 17th century BC - 15th century BC Decades: 1690s BC - 1680s BC - 1670s BC 1660s BC 1650s BC 1640s BC 1630s BC 1680s BC - Events and trends. Egypt: Start of Sixteenth Dynasty Egypt: Development of leavened bread (date approximate). 1680s BC - Significant people. Hammurabi, died 1686 BC short chronology. Death of Heremon, Irish legend (1684 BC) Category: Including:

• 1680s BC - Events and trends
• 1680s BC - Significant people

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The units of time first developed by humans would likely have been days and months (moons). In some parts of the world the cycle of seasons are apparent enough to lead to people speaking about years & seasons (e.g. 4 summers ago, or 4 floods ago). With the invention of agriculture in the 3rd millennium BC, people relied heavily on the cycles of the season for planting and harvesting crops. Most humans came to live in settled societies and the whole community relied upon accurate predictions of the seasonal cycle. This led to the developm ...

See also:

Intellectual history of time, Intellectual history of time - Towards time-keeping, Intellectual history of time - Isochronous time

Read more here: » Intellectual history of time: Encyclopedia II - Intellectual history of time - Towards time-keeping