Nammalwar Thiru Nakshatram is observed in Vrishabha Masam on Visakha Nakshatram (Visakham Nakshatra).
It is also known as Nammalwar Janma Nakshatrotsavam (Nammalwar Thiruvaradhana).
In 2014, Nammalwar Thiru Nakshatram date is 11 June, Wednesday.
It coincides with ‘Vaigasi Masam’ of Tamil calendar, ‘Vaishakha Masam / Jyeshta Masam’ in Telugu and Kannada calendars.