Lok Sabha elections for the two seats in Arunachal Pradesh will also be held on April 9.
The tenure of the 60-member Arunachal assembly ends on November 4 this year.
The notification for the assembly polls will be announced on March 15 while nominations can be filed till march 22.
After scrutiny of papers on March 24, nominations can be withdrawn till March 26.
The Commission had on March 5 announced the schedule for elections to the 16th Lok Sabha and assemblies of Andhra Pradesh, Odisha and Sikkim.