Panguni

Panguni is the twelfth and last month of the Tamil calendar. The name of the month is derived from the position of the Moon near the Uttiram nakshatra on the pournami day. The month corresponds to pin-pani kaalam and falls in March-April in the Gregorian calendar.
In the Hindu lunar calendar, it corresponds to the twelfth month of Phalguna, falling in the Gregorian months of December-January. In the Hindu solar calendar, it corresponds to the last month of Mina and begins with the Sun's entry into Pisces. In the Vaishnav calendar, it corresponds to the twelfth month of Govinda.

Festivals

Panguni Uthiram is a Tamil festival that falls on the day when the Nakshatra of Uttiram aligns with purnima in the month of Panguni. The day commemorates the divine marriages of Hindu deities such as Shiva and Parvati, Murugan and Deivanai, and Vishnu and Lakshmi. It also marks the day of manifestation of lord Ayyappan. On the day, special rituals, processions and marriage ceremonies of gods are conducted across Hindu temples.
Rama Navami, which commemorates the birth of Hindu god Rama, is celebrated on Navami thithi of the Shukla Paksha of the month.