Name of Historical Period
|
Beginning Year |
End Year |
Length in years |
| Post Modern | 1977 | present | 41 |
| Third Modern | 1492 AD |
1977 AD |
485 |
| Medieval | 391 AD |
1492 AD |
1101 |
| Second Modern B | 31 BC |
391AD | 422 |
| Second Modern A | 625 BC |
31 BC |
594 |
| First Modern | 1550 BC |
625 BC | 925 |
| Ancient | 3600 BC |
1550 BC |
2050 |
| Chalcolithic | 4500 BC |
3600 BC | 900 |
| Primeval | 9600 BC |
4500 BC |
5100 |
| Pre-historic | 9600 BC |
400,000 BC | 391,400 |