From 2016, Deepavali date won’t be subjected to change.
The Hindu Endowments Board and Hindu Advisory Board have reviewed this process and a clear set of parameters has been defined to establish the date for Deepavali.
In the past, the date for Deepavali was estimated in March or April of the previous year based on the lunisolar calendar, and confirmed against the Hindu Almanac when it was available in the early part of the year.
For more information, please contact the Hindu Endowments Board.