The Diwali calendar of this year (2017) and next year (2018) is given here. Each year on the dawn of Ammavasya in the month Kartik the festival of Diwali is celebrated.
Diwali Date 2017 - October 19th, 2017
Diwali Date 2018 - November 7th, 2018
In 2017, Diwali will be celebrated on October 19th.