An annual tithi calculator portable is a mobile-friendly digital tool designed to track lunar dates according to the Hindu calendar (Panchang). Unlike a traditional Gregorian calendar, which follows the sun, the Hindu calendar relies on the moon's cycles. Because a "Tithi" (lunar day) does not align perfectly with a 24-hour solar day, these calculators are essential for accurately scheduling annual rituals, festivals, and memorial services (Shraddha). Key Functions of a Portable Tithi Calculator

5. Nakshatra (Lunar Mansion) Optionally

Some advanced models also include the daily Nakshatra and Karana (half-tithi) for Muhurta (electional astrology).

  1. Power on your device or open the software from your USB.
  2. Set location: Enter “Chicago, IL” or manually input coordinates.
  3. Set time zone: Central Time (CT) – adjust for Daylight Saving if applicable.
  4. Set year: 2026.
  5. Navigate to “Ekadashi” filter or scroll to June.
  6. The calculator shows:
    1. Date and Location Input: Users can input the desired date and location to obtain accurate Tithi calculations.
    2. Tithi Calculations: The calculator provides Tithi calculations for the specified date and location.
    3. Hindu Date Conversion: The calculator converts the Gregorian date to the corresponding Hindu date.
    4. Start and End Times: The calculator provides the start and end times for the calculated Tithi.
    5. ** Auspicious Time Indication**: Some calculators indicate the auspicious time for specific ceremonies or rituals.

    Pitru Paksha Lists: Many calculators automatically list suitable days during the 15-day Pitru Paksha (Mahalaya) period for performing ancestral rites.

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    Accuracy: Unlike printed calendars, it calculates precise tithi timings based on GPS location and sunrise.

    2. Sunrise & Sunset Data (Location-Based)

    Since many rituals depend on local sunrise, your calculator must allow manual entry of coordinates or select from a global city database.

    Comprehensive Insights: Many modern tools, like the Tithi Chakra app, provide the full "five limbs" (Panchang) of the calendar: Tithi, Vaara, Nakshatra, Yoga, and Karana. Top Features to Look For