The Pambu Panchangam 2003 was the authority on the dates of major festivals. Since Hindu festivals are based on the lunar calendar, their dates shift annually in the Gregorian system.

For the year 2003, the almanac was prepared using the but reinterpreted through Pambu’s unique commentary. The key feature was the detailed analysis of Rahu-Ketu transits and their effect on the 12 Rashis (zodiac signs).

In the vast landscape of Hindu astrology and traditional almanacs (Panchangams), few names command as much respect and curiosity as the . Unlike standard Panchangams that primarily focus on Tithi (lunar day), Nakshatra (star), Yoga , and Karana , the Pambu Panchangam carries a unique, esoteric flavor. It is famously associated with Pambu Kumaragurudasan (often referred to as Pambu Swamigal), a revered 20th-century saint and astrologer from Tamil Nadu known for his venomous (yet precise) predictions—hence the name "Pambu," which means snake or serpent in Tamil.