Vivah Panchami is an important day in the Hindu calendar as it commemorates the wedding anniversary of Lord Ram and Goddess Sita.
According to drikpanchang.com, on Vivah Panchami day, Lord Ram and Goddess Sita got married and this day is celebrated as the marriage anniversary of Lord Ram and Goddess Sita. Hence, devotees hail this day as Vivah Panchami.
Significance:
The day falls on the Panchami tithi of Shukla Paksha in Margashirsha, according to the Hindu calendar.
Devotees of Lord Ram and Sita perform puja, observe a day-long fast and organise marriage ceremony for the deities.
Vivah Panchami: Date, time and tithi for Mumbai
Date: December 8
Panchami Tithi Begins - 11:40 PM on December 07
Panchami Tithi Ends - 09:25 PM on December 08
(Date & Time Source: Drikpanchang)