The Hindu system of time reckoning uses large units of time like yugas and mahayugas that last for thousands of years, rather than days, weeks and months. A mahayuga lasts for 4,320,000 years and is divided into four yugas of different lengths: Satya Yuga, Treta Yuga, Dvapara Yuga and Kali Yuga. The document provides details on the durations of each yuga and how they form a repeating cycle within the mahayuga. It also notes that the current yuga is Kali Yuga, which began over 5,000 years ago, and attributes the source and copyright for the information to radhasyam brahmachari.