A panchānga is a Hindu calendar and almanac, which follows traditional units of Indian timekeeping, and presents important dates and their calculations in a tabulated form. It is sometimes spelled Pancanga, Panchanga, Panchaanga, or Panchānga, and is pronounced Panchānga. Pachangas are used in Jyotisha (Jyotisya).

The basic purpose of Hindu Panchāngam is to check various Hindu festivals and auspicious time (election- Muhurta). In the Hindu system of election, various element of Panchāngam constitute auspicious and inauspicious moments (Yogas) by combination of weekday-Tithi, weekday-constellation, weekdays-Tithis-constellations. In addition, individual weekdays, Tithis, constellations, Yoga and Karanas have been prescribed for specific activities which fructify during their currency.
For selecting an auspicious moment Panchāngam Shuddhi (purified-time) is fundamental. In addition favourable transits, purified ascendant, absence of malefic yogas, favourable Dasha (Hindu progression), name of doer, propitiations, chanting of Mantras, place of activity, social customs, omens, mode of breathing are also examined.