Bhaiya Duj, also known as Bhau Beej or Bhai Dooj, is a cherished Hindu festival that celebrates the sacred bond between brothers and sisters. Observed on the second day after Diwali during the Kartik month, the festival symbolizes the sister's love and prayers for her brother's well-being, and the brother's vow to protect her. On this day, sisters apply a ceremonial tilak on their brothers' foreheads, perform aarti, and offer sweets. In return, brothers give gifts and blessings. The ritual strengthens familial bonds and reflects love, protection, and togetherness.

Bhaiya Duj is celebrated with great affection and joy across India, especially in northern and western regions. It falls on the Dwitiya Tithi of Shukla Paksha in the Kartik month, just two days after Diwali. According to legend, Yama, the god of death, visited his sister Yamuna on this day. She welcomed him with aarti, tilak, sweets, and a hearty meal. Touched by her gesture, Yama granted her a boon that any brother who visits his sister on this day will be blessed with long life and prosperity. This tradition has since been observed by siblings to reaffirm their love and commitment to each other. The day begins with sisters preparing special thalis with roli, rice, diya, and sweets. After the tilak ceremony, brothers give gifts, and families often gather for a festive meal. In Maharashtra, it is called Bhau Beej, and in Bengal, it is Bhai Phonta. In all its forms, Bhaiya Duj reinforces familial harmony and is a joyful conclusion to the Diwali festivities.