Periodisation of the Indus Valley Civilisation
Regionalisation Era
### Regionalisation Era

While the Early Harappan Phase was proposed to start at ca. 3300 BCE, the Regionalisation Era has been proposed to start earlier, at 4000 BCE to ca. 5000 BCE.

[S. P. Gupta](/wiki/S._P._Gupta "S. P. Gupta"), taking into account new discoveries, periodised the Harappan Civilisation in a chronological framework that includes the Early, Mature, and Late Harappan Phase, and starts with the same date as the Regionalisation Era:

| Date | Main phase | Subphase | Harappan Phase | Era |
| --- | --- | --- | --- | --- |
| ca. 4000 \- 3500 BCE | Formative Phase | e.g., [Mehrgarh](/wiki/Mehrgarh "Mehrgarh")\-IV\-V | Pre\-Harappan |Regionalisation Era

| ca. 3500 \- 2800 BCE | Early Phase | e.g., [Kalibangan](/wiki/Kalibangan "Kalibangan")\-I |Early Harappan

| ca. 2800 \- 2600 BCE | Period of Transition | e.g., [Dholavira](/wiki/Dholavira "Dholavira")\-III |
| ca. 2600 \- 1900 BCE | Mature Phase | e.g., [Harappa](/wiki/Harappa "Harappa")\-III, [Kalibangan](/wiki/Kalibangan "Kalibangan")\-II | Mature Harappan | Integration Era |
| ca. 1900 \- 1500 BCE | Late Phase | e.g., [Cemetery H](/wiki/Cemetery_H "Cemetery H"), [Jhukar](/wiki/Jhukar-jo-Daro "Jhukar-jo-Daro") |Late Harappan

Localisation Era

| ca. 1500 \- 1400 BCE | Final Phase | e.g., [Dholavira](/wiki/Dholavira "Dholavira") |
|


When does the Regionalisation Era start and end?