Rogaahari Vrata is an auspicious austerity dedicated to Surya Bhagavan (Sun God). It is observed on all Saptami days.
During this vrata, the performer needs to depend on the diet of milk and fruits. The devotee should sleep on the bare ground and offer Surya Bhagavan with variety types of flowers.
All the Saptami days (Seventh tithi in each Paksha) are auspicious for performing Rogaahari Vratha.