Pradosha or Pradosham (IAST: Pradoṣa) is a bimonthly occasion on the thirteenth day of every fortnight in the Hindu calendar. It is closely connected with the worship of the Hindu god Shiva. The auspicious three-hour period 1.5 hours before and after sunset is considered as the most suited and optimal time for worship of Shiva on this day. The fasting vow performed during the period is called “Pradosha vrata”. A devotee should wear rudraksha, Vibhuti and worship Shiva by abhisheka, sandal paste, bael leaves, fragrance, deepa and naivedya (food offerings).