There seems to be a confusion over Deepavali 2013 date. Do a search in Google and nearly every result show Deepavali is on 3rd November 2013 (Sunday), including our next door neighbor Singapore (http://www.mom.gov.sg/employment-practices/employment-rights-conditions/leave-and-holiday/Pages/PublicHolidays2013.aspx).
Refer Wiki as well: http://en.wikipedia.org/wiki/Diwali
However the calendar released by Bahagian Kabinet of Prime Minister’s Department lists 2 November as Deepavali (link here: http://www.kabinet.gov.my/images/stories/kelepasanam/2013_merged.pdf)
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I’ve just sent feedback to Bahagian Kabinet to ask them to check since Deepavali supposed to be on 3rd. Hope to get reply from them. As far as I know, the festival date is consulted with KL Mariamman Temple Devasthanam, so wonder how they ended up with different date than rest of the world
Deepavali being a religious festival, is calculated based on astronomy. If you check the Hindu panchangam, it falls on ammavasai (no moon day), which is on 3rd of November this year.
Hope things can be clarified immediately as this involves religious festival and public holiday, where people will make plans for celebration and travel. Especially when Deepavali falls on Sunday because Monday becomes public holiday! 🙂