A Hindu lunar month is divided into two fortnights: Shukla Paksha (bright fortnight, waxing Moon) and Krishna Paksha (dark fortnight, waning Moon). Each consists of 15 Tithis. The month begins on the day after Amavasya (new moon) with Shukla Pratipada and reaches its peak at Purnima (full moon), then begins Krishna Paksha back toward the next new moon.

Shukla Paksha: The Bright Fortnight

Shukla Paksha is considered the more auspicious half of the lunar month. Rituals for prosperity, new beginnings, and positive intentions — such as starting a business, housewarming, or marriage — are strongly preferred in Shukla Paksha. The growing light of the Moon symbolizes growth, increase, and positive energy.

Krishna Paksha: The Dark Fortnight

Krishna Paksha is not inauspicious per se — it is simply suited for different activities. Ancestor rituals (Pitru Tarpan), detoxification treatments, removing obstacles (Pariharam), and introspective practices are performed in Krishna Paksha. The waning Moon energy is associated with release and letting go.

Which Paksha Is Right for Your Event?

Traditional Muhurtham selection always starts by choosing Shukla Paksha for auspicious events. The exceptions are Mahalaya Paksha (the entire Krishna Paksha of Bhadrapada month), which is especially sacred for ancestor rituals, and specific Nakshatrams in Krishna Paksha that are approved for marriage (Shravana, Uttara Phalguni, etc.).