Panchanga - Vedic Calendar Library

Pure Python library for traditional Vedic calendar (Panchanga) calculations based on Suryasiddhanta (ca. AD 1000).

Installation

pip install panchanga

Quick Example

import panchanga

# Convert Gregorian to Julian Day and Ahargana
jd = panchanga.modern_date_to_julian_day(2025, 3, 14)
ahargana = panchanga.julian_day_to_ahargana(jd)

# Get calendar information
kali_year = panchanga.ahargana_to_kali(ahargana)
saka_year = panchanga.kali_to_saka(kali_year)
vikrama_year = panchanga.saka_to_vikrama(saka_year)

# Calculate astronomical positions
tslong = panchanga.get_true_solar_longitude(ahargana)
tllong = panchanga.get_true_lunar_longitude(ahargana)

# Get lunar day (tithi)
tithi = panchanga.get_tithi(tllong, tslong)
tithi_day, ftithi = panchanga.get_tithi_set(tithi)

# Get naksatra
naksatra = panchanga.get_naksatra_name(tllong)

Features

• Date conversions (Gregorian ↔ Julian Day ↔ Ahargana)
• Vedic calendar era conversions (Kali, Saka, Vikrama)
• Lunar calculations (tithi, naksatra, yoga, karana)
• Solar calculations (saura masa, samkranti)
• Astronomical calculations (sun/moon longitudes)
• Sunrise time calculations
• Ayanamsa calculations
• Horoscope/birth chart calculations

Documentation

See API documentation for detailed usage.

Credits

Based on the Perl implementation by M. YANO and M. FUSHIMI (v3.14, 2014). Python port by Ayush Jha.