What are some cultural rituals, ceremonies, and festivals associated with rain, water deities, and water worship in different cultures and religious traditions?

Cultures around the world have rituals, ceremonies, and festivals dedicated to rain, water deities, and water worship, often involving prayers, offerings, and symbolic acts to invoke rain, ensure fertility, and promote prosperity. Examples include rain dances, water festivals, and religious observances such as the Hindu festival of Varuna Jayanti, the Native American rainmaking ceremonies, and the Christian sacrament of baptism.