Panchanga means a calendar with five “limbs”: vara (weekday), tithi, nakshatra, yoga, and karana. The Positional Astronomy Centre prints those five elements in India’s Rashtriya Panchang alongside sunrise, sunset, and planetary data. A daily entry can show when an element ends, so a date and a changeover time are different pieces of information.
The five limbs at a glance
| Element | What it tracks | Reference division |
|---|---|---|
| Vara | Weekday in the calendar’s local day convention | Seven-day cycle; day assignment may use local sunrise |
| Tithi | Moon’s ecliptic longitude ahead of the Sun’s | Each 12° of elongation; 30 tithis per synodic cycle |
| Nakshatra | Moon’s sidereal ecliptic longitude | 27 sectors of 13°20′ |
| Yoga | Sum of sidereal Sun and Moon longitudes | 27 divisions of 13°20′ |
| Karana | Half a tithi, based on Moon–Sun longitude difference | Each 6° of elongation |
These are the astronomical definitions used in the national reference. Religious observances, month names, and regional calendar rules add another layer. The publication explicitly describes its aim of bringing divergent practices into a common astronomical almanac.
How to read a daily entry
- Check the locality and time zone. The almanac prints events in Indian Standard Time and gives sunrise for an adopted station. A web calculator should identify the place and zone used for its local-day label.
- Read the end time as an end time. The Rashtriya Panchang explains that a time beside a tithi, nakshatra, yoga, or karana marks the moment that interval finishes. The next interval follows.
- Keep angular events and sunrise labels separate. An angular changeover is a geocentric instant. Which element is assigned to a sunrise-based day depends on the sunrise convention and location.
- Keep the ayanamsa with the result. Nakshatra and yoga use nirayana longitudes in the publication. A different sidereal origin can shift the calculated changeover.
A tithi does not have a fixed twenty-five-hour length. Its duration reflects the changing angular speed between Moon and Sun, and it may span more than one civil sunrise or begin and end within one civil date. The publication has a notation for an element that covers the whole sunrise-to-sunrise interval.
An example of the calculation idea
If the Moon’s longitude is 41° ahead of the Sun’s, the angular difference lies in the fourth 12° tithi interval (36°–48°). The same 41° falls in the seventh 6° karana interval (36°–42°). This is an arithmetic illustration, not a dated almanac result. Actual tools need a precise instant, an ephemeris, and a rule for boundary timestamps.
For the nakshatra, use the Moon’s chosen sidereal longitude alone. For yoga, add chosen sidereal Sun and Moon longitudes, reduce the sum modulo 360°, and locate its 13°20′ sector. The 27 nakshatra table gives the named sectors; the ayanamsa guide explains the sidereal setting.
Frequently asked questions
Is a panchanga the same as a birth chart?
No. A panchanga organizes a day and its changeovers; a birth chart describes celestial longitudes and angles at a particular instant and place. Both can use sidereal coordinates, but they answer different questions.
Why does an online panchanga show two labels in one day?
An element can end during the local day, so the next one begins before the date changes. Look for the timestamp and its time zone.
Can the same geocentric tithi have different local dates?
Yes. The changeover instant is shared, while its local clock date and sunrise relationship vary by place.
Open the separate panchanga calculator →
Primary references
- Positional Astronomy Centre, Rashtriya Panchang preface ↗ — publication scope
- Positional Astronomy Centre, explanation ↗ — five elements and end-time convention
- Positional Astronomy Centre, name table ↗ — published element names