Porsi, Sadh Porsi, Purimuddh, Avaddh — Jain time markers explained
In traditional Jain timekeeping, the day is divided into a sequence of markers anchored to sunrise and sunset. Each marker has a name, a calculated time, and a connection to specific spiritual practices. The names — Porsi, Sadh Porsi, Purimuddh, Avaddh — sound technical, but the system is straightforward once you understand the logic.
For today's Jain time markers in any city, the Jain prayer time page calculates them all from local sunrise and sunset.
The basic structure
The day is divided into 30 muhurtas (each 48 minutes). The first muhurta starts at sunrise; subsequent muhurtas follow.
Specific markers within this structure:
| Marker | Time from sunrise | Approximate clock time (winter) |
|--------|-------------------|----------------------------------|
| Sunrise | 0 | 6:30 AM |
| Navkarsi | 48 min after | 7:18 AM |
| Porsi | 1/4 of day | 9:24 AM |
| Sadh Porsi | 3/8 of day | 10:48 AM |
| Purimuddh | 1/2 of day (noon) | 12:30 PM |
| Avaddh | 3/4 of day | 3:36 PM |
| Sunset | end of day | 5:30 PM |
(Times shown are illustrative; actual times vary by city, date, and method of calculation.)
What each marker means
Navkarsi (48 minutes after sunrise)
The first meal of the day is permitted starting at Navkarsi. Before this, traditional practice avoids food (often water also). The 48-minute delay corresponds to the first muhurta, ensuring sufficient daylight is established before eating.
Porsi (1/4 of day)
About 3 hours after sunrise. Sometimes used as a reference for mid-morning practices or breakfast timing in stricter observance. In some traditions, certain prayers or meditations are done at Porsi.
Sadh Porsi (3/8 of day)
Halfway between Porsi and noon. Specific spiritual practices in some traditions; less commonly observed today than Navkarsi or Pratikraman.
Purimuddh (1/2 of day = solar noon)
The midpoint of daylight. The sun is at its highest in the sky. Spiritually significant in some Jain traditions; corresponds to other faiths' midday observances.
Avaddh (3/4 of day)
About 3 hours before sunset. Mid-afternoon. Less commonly invoked than other markers; mentioned in some traditional Jain texts.
Tivihar / Chauvihar (sunset)
The boundary between day and night. Specific dietary observances begin:
- Tivihar: avoidance of three categories of food (typically grains, dairy, fruit) overnight
- Chauvihar: avoidance of all four food categories (the above plus water) overnight
These are stricter than Navkarsi-time observance and are practiced by more devout Jains.
Pratikraman (at sunset and sunrise)
Formal self-reflection practice, performed twice daily. Covered in detail in the Jain Pratikraman post.
Why so many markers?
The system reflects centuries of Jain tradition. The reasoning:
1. Ahimsa (non-violence) requires precise timing. Eating overnight is restricted because of the risk of harm to small organisms in food (insects, microbes) when visibility is limited. Each marker establishes a window of permitted activity.
2. Spiritual discipline benefits from regular structure. Ritualized timing creates habit and mindfulness.
3. Solar anchoring is universal. The system works in any location because it's based on local sunrise/sunset, not absolute clock time.
4. Different markers for different purposes. Mealtime restrictions, prayer times, fasting boundaries — different markers for different observances.
How modern Jains use these
Modern Jain practice is diverse. Most observant Jains:
- Use Navkarsi as the meal-start time (especially during fasts)
- Use Pratikraman twice daily as core spiritual practice
- Observe Tivihar/Chauvihar as evening fasting boundaries
- Less commonly observe Porsi, Sadh Porsi, Avaddh in daily life
- Use these markers in fasting periods like Paryushan or Ayambil
The full system is most actively used by ascetic monks and nuns, and by lay practitioners during fasting periods.
Calculation method
All markers are calculated from local sunrise and sunset:
- Day length = sunset time - sunrise time
- 1/4 of day = sunrise + (day length / 4) → Porsi
- 3/8 of day = sunrise + (3 × day length / 8) → Sadh Porsi
- 1/2 of day = sunrise + (day length / 2) → Purimuddh (this is usually solar noon)
- 3/4 of day = sunrise + (3 × day length / 4) → Avaddh
- 48 minutes after sunrise = Navkarsi
The Jain prayer time page does these calculations automatically for any city.
Variation by season
Because the markers are anchored to sunrise/sunset, they shift with the seasons:
Summer in Mumbai: sunrise ~6 AM, sunset ~7 PM. Day = 13 hours. Navkarsi at 6:48 AM. Purimuddh (noon) at 12:30 PM. Avaddh at ~3:45 PM.
Winter in Mumbai: sunrise ~7 AM, sunset ~6 PM. Day = 11 hours. Navkarsi at 7:48 AM. Purimuddh at 12:30 PM. Avaddh at ~3:15 PM.
The clock times shift; the muhurta concept is consistent.
Variation by city
Same reasoning applies across cities at different latitudes:
Mumbai (19°N): sun shifts moderately. Day length 11-13 hours.
London (51°N): dramatic seasonal shift. Day length ranges from 8 hours (winter) to 16+ hours (summer). Markers shift correspondingly.
Singapore (1°N): minimal seasonal shift. Day length ~12 hours year-round. Markers stay close to constant.
Diaspora challenges
Jain communities outside India sometimes face challenges with the markers:
- Sunrise/sunset times very different from India, so familiar Indian timing rules of thumb don't transfer
- Workday conflicts: a 7:48 AM Navkarsi conflicts with morning commute in London winter
- Winter day length issues: at high northern latitudes, the workday and the day-as-defined-by-sun-markers may not align
Most diaspora Jains adapt by observing the markers as best they can while accepting modern life constraints.
FAQ
Do all Jains observe all these markers?
No. Strict observance is most common among ascetic monks/nuns and during specific fasting periods (Paryushan, Ayambil, etc.). Most lay Jains observe Navkarsi and Pratikraman daily and occasionally other markers.
What's the difference between Navkarsi and Porsi?
Navkarsi is 48 minutes after sunrise. Porsi is 1/4 of the day after sunrise (~3 hours). Both are time markers but Navkarsi is more commonly used in daily practice because it determines when the first meal can be eaten.
Why so many markers if most aren't used daily?
The full system existed in classical Jain texts for ascetic and ritual use. Daily lay practice has simplified to a subset. The full system remains documented and is invoked during fasting periods.
Are these markers used in non-religious Jain calendars?
No, these are religious time markers. Modern Jain calendars also include Hindu calendar elements (tithis, nakshatras) for festival dates, but those are different from the muhurta-based daily markers.
How accurate do the calculations need to be?
For everyday practice, ±1-2 minutes is fine. For specific ritual contexts (some monks' practices), calculation should be more precise.
What if I'm at high latitudes where the day is very short?
The markers still work proportionally. Navkarsi is still 48 minutes after sunrise, even if sunrise is at 9 AM in Stockholm in December. The other markers are calculated as fractions of the (short) day length. Practice continues; the absolute clock times are different.
Bottom line
The Jain day is structured around traditional time markers — Navkarsi, Porsi, Sadh Porsi, Purimuddh, Avaddh, and the sunset markers Tivihar and Chauvihar. Each is calculated from local sunrise and sunset and corresponds to specific dietary and spiritual practices. Daily lay practice typically focuses on Navkarsi and Pratikraman; the full system is most actively used during fasting periods.
For all of these time markers calculated from local sunrise and sunset, the Jain prayer time page handles the math.