When is Diwali in 2000?

7 November 1999 was the date of Diwali according to Deepavali.net

Diwali falls on the new moon night (Amavasya) between mid-October and mid-November. Diwali is celebrated for five days according to the lunisolar. It begins in late Ashvin (between September and October) and ends in early Kartika (between October and November).