Key state elections in India will take place in several phases over April and May, the Election Commission has said.
Polling in four states and one union territory will run from 4 April to 10 May. Counting is due on 13 May.
West Bengal, where a Communist-led coalition has ruled uninterruptedly for 34 years, will have a six-phase election.
The main Congress party will be battling key regional and Communist parties in the election.
The Election Commission said that West Bengal would have the most staggered elections to ensure law and order as many parts of the state were “disturbed” because of political violence.
Voters in Assam will cast their ballots over two days. Tamil Nadu, Kerala and Pondicherry will see a single day of polling.
* West Bengal: 18 April, 23 April, 27 April, 3 May, 7 May, 10 May
* Assam: 4 April, 11 April
* Tamil Nadu: 13 April
* Kerala: 13 April
* Pondicherry: 13 April