Sunday is the day of Surya. As the first day of the week, it is favorable for fundamental actions: for self-knowledge and elimination of delusions associated with false self-identification; for strengthening health and complete healing; for achieving an awakened state and public beneficial deeds.

Each day of the week is assigned to a corresponding planet: Sunday - to the Sun, Surya; Monday - to the Moon, Chandra; Tuesday - to the Mars, Mangala; Wednesday - to the Mercury, Buddha; Thursday - to the Jupiter, Guru; Friday - to the Venus, Shukra; Saturday - to the Saturn, Shani.