Bhai Dooj is a Hindu festival celebrated two days after Diwali, honoring the bond between brothers and sisters. On this day, sisters pray for their brothers' well-being and prosperity, while brothers give gifts in return. The festival is marked by rituals where sisters apply a ceremonial red mark on their brothers' foreheads and perform an aarti, a traditional prayer ritual. This celebration strengthens family ties and emphasizes love and protection within the sibling relationship, making it a cherished occasion in many Indian households.