Names and references: STEPBible, Tyndale House Cambridge · CC BY 4.0
How we know the date
Both sources reckon from the Genesis genealogies but on different totals. Ussher's Annals (1650) gives 2349 BC (its year of the world 1656 a); Easton's (1897), under “Deluge” gives 2516 BC. The sources differ by 167 years; the year shown (2349 BC) is the one this timeline follows through this stretch, from Ussher's Annals (1650).
Written in-house from the sources below · every year is a quotation
The sources, word for word
“1656. a. … Anno sexcentesimo vitz Noachi, mensis secundi die decimo septimo, Decembris septimo, feria prima, eo cum suis et animalibus omnibus in arcam ingresso; pluviam demisit Deus super terram quadraginta dies et quadraginta noctes : et prevaluerunt aque super terram centum et quinquaginta diebus’. ‘ Aquis deficientibus, wnensis septimi die decimo septimo,”
“It began in the year 2516 B.C., and continued twelve lunar months and ten days, or exactly one solar year.”