Learning center
Understand the astronomy behind Hindu time.
Discover the profound science behind Hindu calendars, Panchang calculations, and how ancient astronomers mapped time with remarkable precision.
Deep Guides विस्तार
Dedicated guides for understanding each calendar concept, with practical meaning, calculation logic, and examples for planning dates.
What is Panchang?पंचांग
The Panchang (Sanskrit: पंचांग) is the Hindu calendar and almanac that provides astronomical data based on the positions of the Sun and Moon. The word comes from “Panch” (five) and “Ang” (limbs), referring to its five key elements:
1. Tithi (तिथि)
Lunar day - based on Moon-Sun angular distance
2. Nakshatra (नक्षत्र)
Lunar mansion - Moon's position in the zodiac
3. Yoga (योग)
Sun-Moon combination - their combined longitude
4. Karana (करण)
Half of Tithi - finer division of lunar day
5. Vara (वार)
Weekday - named after celestial bodies (Surya, Chandra, Mangal, etc.)
These five elements together determine the auspiciousness of any given moment, guiding decisions for important life events, rituals, and daily activities.
Understanding Tithiतिथि
A Tithi is a lunar day, defined as the time it takes for the Moon to travel 12° away from the Sun. Unlike solar days which are fixed at 24 hours, a tithi can range from about 19 to 26 hours.
Shukla Paksha (शुक्ल पक्ष)
Bright fortnight - waxing moon from New Moon to Full Moon
- Pratipada to Purnima
- Moon grows brighter
- Generally auspicious
Krishna Paksha (कृष्ण पक्ष)
Dark fortnight - waning moon from Full Moon to New Moon
- Pratipada to Amavasya
- Moon grows darker
- Good for introspection
The 15 Tithis
The 27 Nakshatrasनक्षत्र
Nakshatras are lunar mansions - 27 divisions of the ecliptic, each spanning 13°20'. The Moon spends approximately one day in each nakshatra, completing the cycle in about 27.3 days.
Each nakshatra has a ruling deity, symbol, and qualities that influence the nature of events occurring during that period. Nakshatras are fundamental to Vedic astrology and muhurat selection.
Hindu Calendar Systemsसंवत्
India uses multiple calendar systems, each with its own epoch, month system, and regional significance.
Vikram Samvat (विक्रम संवत्)
Traditionally associated with the 57 BCE epoch and King Vikramaditya. The year count is usually 56 or 57 years ahead of the Gregorian year, depending on whether the local new year has passed.
Shaka Samvat (शक संवत्)
Starts from the 78 CE epoch and is used by the Indian national calendar. Its year begins around Chaitra, so the offset from Gregorian dates depends on the time of year.
Tamil Calendar (தமிழ் நாட்காட்டி)
Solar calendar used in Tamil Nadu. New Year (Puthandu) on April 14. Months based on zodiac signs. Also uses Thiruvalluvar era.
Bengali Calendar (বাংলা পঞ্জিকা)
Used in Bengal and Bangladesh. Starts from 593 CE. New Year (Pohela Boishakh) around April 14-15.
Muhurat - Auspicious Timingsमुहूर्त
Muhurat refers to auspicious time periods for undertaking important activities. The Panchang identifies both favorable and unfavorable periods each day.
Auspicious Periods
- Brahma Muhurat: 1.5 hrs before sunrise - meditation
- Abhijit Muhurat: Around noon - victory time
- Amrit Kaal: Best time for all activities
Avoid These Periods
- Rahu Kaal: ~1.5 hrs/day - avoid new starts
- Yamaganda: Period ruled by Yama
- Gulika Kaal: Saturn's inauspicious time