How HinduLab Calculates Panchang and Muhurat Timings

Location and Timezone Basis

Panchang and muhurat values depend on the observer location. HinduLab uses latitude, longitude, and timezone for the selected city to calculate sunrise, sunset, lunar day boundaries, and daily timing windows. The default public calendar uses New Delhi, India when no city is selected.

Panchang Elements

The daily panchang surfaces tithi, nakshatra, yoga, karana, vara, sunrise, sunset, moon phase, and related timing context. These values are calculated for the selected date and location, then formatted for the user-facing page.

• Tithi is derived from the angular relationship between the Sun and Moon.
• Nakshatra is based on the Moon's sidereal position.
• Yoga and karana are computed from traditional panchang formulas.
• Sunrise and sunset anchor many daily muhurat divisions.

Muhurat Windows

Choghadiya, hora, rahu kaal, gulika kaal, yama ganda, brahma kaal, and abhijit muhurat are calculated from daily sunrise and sunset windows. HinduLab keeps data-heavy timing tables clean and separates interpretive context from the timing grid.

Vrats and Festivals

Vrat and festival pages combine computed calendar occurrences with editorial context. Some observances are based on tithi and paksha, some on lunar month rules, some on solar Sankranti transitions, and a small number on fixed Gregorian dates.

Because family and regional traditions can differ, HinduLab presents practical calendar context and links users back to city-aware panchang tools when exact local timing matters.

Review and Update Policy

HinduLab pages that change annually use visible dates, generated calendar data, and updated metadata. Editorial guides are revised when content structure, images, route mappings, or calculation explanations change meaningfully.