Ganesh Chaturthi is a significant Hindu festival that celebrates the birth of Lord Ganesha, the remover of obstacles and the patron of knowledge. Here's a brief overview:

*When:* Ganesh Chaturthi is celebrated on the fourth day (Chaturthi) of the bright half (Shukla Paksha) of the month of Bhadrapada, which usually falls in August or September.

*Legend:* According to Hindu mythology, Lord Ganesha was born when his mother, Parvati, created him from the dirt and dust of her body and breathed life into him. She instructed Ganesha to guard the entrance of their home while she took a bath. When Lord Shiva, Parvati's husband, returned home, Ganesha refused to let him in, not knowing that he was his father. Lord Shiva, in a fit of anger, beheaded Ganesha, but later, when Parvati threatened to destroy the universe, he sent his attendants to find the head of the first living being they encountered, which was an elephant. They brought back the elephant's head and attached it to Ganesha's body, reviving him.

*Celebrations:*

1. Idol installation: Clay idols of Lord Ganesha are installed in homes, temples, and public spaces.

2. Puja (worship): Devotees offer prayers, flowers, fruits, and sweets to the idol.

3. Visarjan (immersion): After 10-11 days, the idol is immersed in a body of water, symbolizing the cycle of life and death.

*Significance:*

1. Removal of obstacles: Lord Ganesha is revered as the remover of obstacles, making him a popular deity among students, entrepreneurs, and those seeking success.

2. Knowledge and wisdom: Ganesha is the patron of knowledge, arts, and sciences, making him a revered figure among scholars and intellectuals.

3. Good fortune: The festival is believed to bring good fortune, prosperity, and happiness to those who celebrate it.

*Traditions:*

1. Modak (sweet): A traditional sweet dish, modak, is offered to Lord Ganesha, made from rice flour, jaggery, and coconut.

2. Durva (grass): Durva grass is offered to the idol, symbolizing the devotee's humility and devotion.

3. Aarti (prayer): Devotees sing aarti, a prayer song, to invoke Lord Ganesha's blessings.

Ganesh Chaturthi is a joyous celebration that brings people together, fostering a sense of community and devotion.