If you were born on this day, your star would be Chothi . The 1985 calendar would also list the Karanam (half-tithi) and Yogam . For astrologers, if the star column said Thiruvonam , it would be a day to donate cows or new clothes.
For a day-by-day breakdown of Nakshatras and Tithis, digital archives and specialized tools provide the most accuracy: Drik Panchanghttps://www.drikpanchang.com Malayalam Panchangam for New Delhi, NCT, India mathrubhumi malayalam calendar 1985 with stars
The data shown here are sample data to give a rough idea. For more precise calculation one should check actual Panchang. If you were born on this day, your star would be Chothi