Vivaswat Saptami or Vivaswata Saptami is the birthday or first appearance day of Vivaswat Manu. Vivaswat Saptami 2012 date is June 26. It is observed on Saptami day in Shukla Paksha of Ashada Maas. Vivaswat Saptami is also celebrated as Bhanu Saptami. On this day the Sun God or Surya Bhagawan is worshipped.
Vivaswata Manu is the descendent of Surya Bhagwan hence this saptami is also known as Bhanu Saptami or Surya Saptami. Other major festivals dedicated to Surya deva are – Ratha Saptami (Magh maas) and Surya Sashti (Bhadrapad Maas).