Answer : Ganesh Chathuruthi
Ganesh Chaturthi in Mumbai is a wholesome event as people across the city come together in devotion to Lord Ganesha

Introduction:
Mumbai, the bustling city of India, is known for its vibrant culture and diverse festivals. Among the numerous festivals celebrated in Mumbai, Ganesh Chathurthi stands out as the most popular and widely celebrated one.

Explanation:
Ganesh Chathurthi:
Ganesh Chathurthi is a Hindu festival dedicated to Lord Ganesha, the elephant-headed deity who is revered as the remover of obstacles and the god of wisdom and prosperity. It is celebrated with great enthusiasm and grandeur in Mumbai, as well as in other parts of Maharashtra.

Key Points:
- The festival usually falls between August and September and lasts for 10 days.
- The celebrations begin with the installation of beautifully crafted idols of Lord Ganesha in homes and public pandals.
- Elaborate decorations, including colorful lights and flowers, adorn the pandals and streets.
- People offer prayers, chant hymns, and perform aarti (rituals) to seek the blessings of Lord Ganesha.
- The festival also involves cultural performances, music, dance, and processions known as 'Ganesh Visarjan,' where the idols are immersed in water bodies like the Arabian Sea or local lakes.
- The visarjan processions are a spectacle to behold, with thousands of devotees joining in the lively and enthusiastic celebrations.
- The immersion of the idols symbolizes bidding farewell to Lord Ganesha with the belief that he will return the following year.

Why Ganesh Chathurthi is the most popular festival in Mumbai:
- Deep-rooted cultural significance: Lord Ganesha holds a special place in the hearts of Mumbaikars. His presence is believed to bring good fortune and positivity. The festival is deeply rooted in the cultural fabric of Mumbai, making it a favorite among the locals.
- Community participation: Ganesh Chathurthi is a festival that brings people together. The entire community participates in the celebrations, irrespective of caste, creed, or social status. It fosters a sense of unity and camaraderie among the people of Mumbai.
- Extravagant celebrations: The festival is celebrated on a grand scale in Mumbai, with larger-than-life idols, elaborate decorations, and cultural performances. The city comes alive with the spirit of devotion and celebration, attracting tourists and visitors from all over the world.
- Social and economic impact: Ganesh Chathurthi has a significant impact on the social and economic aspects of Mumbai. The festival provides employment opportunities to artisans, craftsmen, and vendors who create and sell various items associated with the festival. It also boosts tourism and generates revenue for the city.
- Emotional connect: The festival evokes a strong emotional connect among the people of Mumbai. It is a time for families and friends to come together, celebrate, and create cherished memories. The joy and excitement associated with Ganesh Chathurthi make it an integral part of Mumbai's cultural identity.

Conclusion:
In conclusion, Ganesh Chathurthi is the most popular festival in Mumbai due to its deep cultural significance, community participation, extravagant celebrations, social and economic impact, and emotional connect. The festival brings people together, fosters unity, and showcases the rich cultural heritage of Mumbai.