What is the importance of 1919 in India?

The year 1919 was an important one in India as it was the year that the Rowlatt Act was passed. The passing of the act would lead to a chain of events culminating in the massacre at Jallianwala Bagh. 

This would be a turning point in the Indian Independence movement as its leaders would demand complete independence instead of mere dominion status.

For further reading check the following articles:

• Jallianwala Bagh Massacre
• Legislations in British India