Kali ahargaṇa ( Kali ahargaṇa number or Kalidina ) is an integer associated with a civil day. The integer represents the number of civil days in a collection of consecutive days beginning with a special day called the kali epoch and ending with a specified day.[1] Kali ahargaṇa is one of the basic parameters of Indian astronomy and it is extensively used in all sorts of astronomical computations.