Generally, no. North India predominantly uses the Nirayana system with Lahiri Ayanamsa. However, for historical consistency, researchers use it across India.
Websites like the Internet Archive (archive.org) and dedicated Tamil cultural libraries frequently feature scanned copies of vintage Pambu Panchangam (the famous snake-branded almanac) or Maruthuvakudi Panchangam from 1980. Searching for scanned PDF versions allows you to view the original printed tables. Online Astrological Software vakya panchangam 1980 free
Uses fixed, structural formulas passed down through oral and written traditions. It is widely preferred by ancient temples (such as the Chidambaram Natarajar Temple) to schedule annual festivals and rituals. Generally, no