Vaikasi
Vaikasi is the second month of the Tamil calendar. The name of the month is derived from the position of the Moon near the Vaisakha nakshatra on the pournami day. The month corresponds to ila-venil season, and falls in May-June in the Gregorian calendar.
In the Hindu lunar calendar, it corresponds to the second month of Vaishakha, falling in the Gregorian months of April-May. In the Hindu solar calendar, it corresponds to the second month of Vṛṣabha and begins with the Sun's entry into Taurus. In the Vaishnav calendar, it corresponds to the second month of Madhusudanah.