If you are looking for data from this specific year (Siddharthi/Raudri Nama Samvatsaram), it typically contains: Panchangam Essentials:
are available for free through community archives and document-sharing platforms. Where to Find it for Free Several repositories host the historical Maruthuvakudi Vakya Panchangam and other traditional versions for the year 1980: : You can find the full 1980-1981 Rawthiri Varusham PDF uploaded by community members. Vedic Astro Blog : This niche site provides a free download list vakya panchangam 1980 free
You can download the Vakya Panchangam 1980 PDF from the following link: If you are looking for data from this
Acquiring a rare 1980 almanac for free requires knowing the right digital archives. Commercial bookstores have stopped printing the 1980 editions. Here are the most reliable sources: vakya panchangam 1980 free