Kolkata (Calcutta) Panchang for 12 May 2026

Panchang — literally meaning 'five limbs' (pancha = five, anga = limb) — is the traditional Hindu calendar and almanac used across India for thousands of years. It tracks five essential astronomical elements for each day: Tithi (lunar day), Nakshatra (lunar mansion), Yoga (Sun-Moon angular combination), Karana (half-tithi), and Vaara (weekday). Together, these five elements form the backbone of Vedic timekeeping and are indispensable for determining auspicious moments for ceremonies, rituals, and important life events.

Unlike the Gregorian calendar which follows only the solar cycle, Panchang is a lunisolar calendar that harmonizes both the Moon's phases and the Sun's transit through the zodiac. Each day's Panchang readings change based on the precise positions of the Sun and Moon as observed from a specific geographic location. This is why Panchang timings in Mumbai differ from those in Delhi or Chennai — the calculations are inherently location-dependent, tied to local sunrise and sunset.

Panchang serves as the foundation for virtually all Vedic astrological timing. From choosing a wedding date to starting a business, from performing a housewarming ceremony to scheduling surgery, traditional Hindu families consult the Panchang to ensure their activities align with favorable cosmic rhythms. It remains one of the most consulted references in daily Hindu life, bridging ancient astronomical wisdom with practical everyday decision-making.

The Panchang system begins with precise astronomical calculations of the Sun's and Moon's positions at the moment of local sunrise. From these positions, each of the five elements is derived mathematically. Tithi is determined by the angular difference between the Moon and Sun (each 12-degree segment constitutes one Tithi). Nakshatra is the lunar mansion occupied by the Moon (the ecliptic is divided into 27 equal segments of 13 degrees 20 minutes each). Yoga is calculated from the sum of the Sun's and Moon's longitudes (each 13-degree-20-minute segment gives one Yoga). Karana is half of a Tithi (each 6-degree segment). Vaara is simply the day of the week, each ruled by a specific planet.

Because the Moon moves approximately 12 to 15 degrees per day and the Sun moves about 1 degree per day, all Panchang elements change at different times throughout the day. A Tithi might end at 10:30 AM while the Nakshatra transitions at 3:15 PM. This is why accurate Panchang calculations require not just the date but also the exact geographic location — the local sunrise determines when each day's Panchang cycle begins, and the Moon's rapid movement means even a few hours can shift which element is active.

Modern Panchang calculations use a high-precision astronomical engine for planetary positions, combined with the Lahiri Ayanamsa (the official ayanamsa adopted by the Indian government) to convert tropical positions to the sidereal zodiac used in Vedic astrology. This ensures accuracy within arc-minutes, matching the calculations of traditional almanac publishers while being accessible to anyone with an internet connection.

The Panchang system has its roots in the Vedanga Jyotisha, one of the six auxiliary disciplines (Vedangas) of the Vedas, dating back to at least 1400 BCE. The sage Lagadha is credited with composing the earliest known Vedanga Jyotisha text, which established the mathematical framework for tracking lunar and solar cycles. Over the centuries, astronomers like Aryabhata (476 CE), Varahamihira (505 CE), and Bhaskaracharya (1114 CE) refined the calculations, introducing increasingly precise methods for computing planetary positions and calendar elements.

The tradition of publishing annual Panchang almanacs became widespread during the medieval period, with each region of India developing its own authoritative Panchang. The Rashtriya Panchang (National Calendar), established by the Indian government in 1957 under the Calendar Reform Committee led by Meghnad Saha, standardized the Lahiri Ayanamsa and provided a scientific framework for Panchang calculations. Today, digital Panchang tools carry forward this millennia-old tradition, making accurate daily readings accessible to anyone, anywhere in the world.