Early Harappan and Late Harappan are two distinct phases of the Indus Valley Civilization, also known as the Harappan civilization, which flourished from 2600 BCE to 1900 BCE in the northwestern region of the Indian subcontinent.

Early Harappan:
During the Early Harappan phase, which lasted from 2600 BCE to 1900 BCE, the Harappan civilization was in its developmental stage. The key features of this phase are:

- The emergence of small villages and towns along the Indus River and its tributaries.
- The use of mud-brick architecture in the construction of houses, public buildings, and defensive walls.
- The development of a system of weights and measures, which suggests that the Harappans engaged in trade and commerce.
- The use of copper and bronze tools and weapons.
- The cultivation of wheat, barley, and cotton.
- The presence of a religion that involved the worship of mother goddesses and animal motifs.

Late Harappan:
The Late Harappan phase, which followed the Early Harappan phase, lasted from 1900 BCE to 1300 BCE. During this phase, the Harappan civilization declined and eventually disappeared. The key features of this phase are:

- The abandonment of many cities and towns, and the emergence of new settlements in the Ganges-Yamuna doab region.
- The decline of the urban centers, the disappearance of the Harappan script, and the decline in the use of weights and measures.
- The rise of regional cultures and the emergence of new social, economic, and political systems.
- The increasing use of iron tools and weapons.
- The emergence of new religions that involved the worship of Shiva, Vishnu, and other deities.
- The migration of some Harappan people to other regions of the subcontinent.

In conclusion, the Early Harappan and Late Harappan phases represent two distinct stages in the evolution of the Harappan civilization. While the Early Harappan phase was marked by the emergence of small settlements and the development of key features of the civilization, the Late Harappan phase was characterized by the decline of the urban centers and the emergence of new regional cultures.

Early Harappan culture:3500-2600BCE
1. small scale colonies were established.
2. Grainery, pottery and long distance trade system was prevailed.
3. one horn bulls motifs on seals were done.
Late Harappan culture:199-1300BCE
1. Towns were empty in this age.
2. canal system got exhausted.
3. Iron tools were used in this age.