How long can India's religious belief can be traced back how many years?

India's religious beliefs can be traced back over 4,000 years, with roots in the ancient Indus Valley Civilization. The Vedic period, which began around 1500 BCE, marks a significant development in Hinduism, while other religions such as Buddhism and Jainism emerged around the 6th century BCE. Additionally, India's diverse spiritual landscape includes Islam, Christianity, and various folk traditions, reflecting a rich tapestry of beliefs that have evolved over millennia.