Panguni is the 12thand the last month of the Tamil calendar, which corresponds to March–April and is also known as Phalgun. Uthiram or Uttara Palguni is an auspicious star. Panguni Uthiram is the day when the star Uthiram falls in the Tamil month of Panguni. The day gains more importance as the full moon coincides with the occasion as well.
Panguni Uthiram is the occasion that lays great stress on Grihasthya, the institution of marriage and the life of a married individual. The Hindu dharma attaches a lot of importance to the householder and lays strong emphasis on the duties he is required to discharge, entrusting him even with the responsibility of taking care of those sections of the society, who are incapable of sustaining themselves.
This day, highlights the bonding between a man and a woman who enter into wedlock, so that together, they can uphold the principles of righteousness and support the society, show the way to lead a married life that can lead you to salvation. It is on this Panguni Uthiram day, according to Valmiki Ramayana, the divine incarnations Rama and Sita entered into wedlock. Muruga, too, married Devasena or Deivanai, while Shiva and Parvati are also said to have united in the sacred relationship, on this day