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- proper noun Hinduism The
secondday ( tithi) in the lunar fortnight ( paksha) of the Hindu calendar.
from Wiktionary, Creative Commons Attribution/Share-Alike License
Lucknow: Special prayers are offered to 17th son of Lord Brahma, the Lord Chitragupta, on the auspicious day of Yam-Dwitiya.
I like the way Amitabh Bachchan says Dwitiya in shuddh Hindi.
Nilakantha explains both Dhriti and Dwitiya in a spiritual sense.
By Dhriti is meant steadiness of intelligence; by Dwitiya lit, a second.
The "Duj" comes from the fact that this is celebrated exactly two days after new moon, on the Dwitiya right after Diwali.