Enter your exact birth details for precision Vedic analysis.
Enter your birth details above to calculate your Janma Tithi — the sacred lunar day of your birth. Discover your Tithi, Paksha, ruling planet, and receive an AI-powered personalised reading based on your actual birth chart. Powered by Swiss Ephemeris with Lahiri Ayanamsa.
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Your Janma Tithi (birth Tithi) is the lunar day you were born on, one of 30 Tithis determined by the exact angular distance between the Sun and Moon at your birth moment — not your calendar birthday. Enter your birth details above to calculate it instantly using Swiss Ephemeris with Lahiri Ayanamsa.
Your Janma Tithi (जन्म तिथि) is the lunar day on which you were born — also called your Tithi Birthday or Panchang birthday — one of the five essential elements (Panchanga) of the Vedic Panchang, alongside Nakshatra, Yoga, Vara, and Karana. Unlike your solar birthday, which repeats on the same calendar date each year, your Tithi is determined by the angular relationship between the Sun and Moon at the exact moment of your birth. AstroWord's free birth Tithi calculator uses Swiss Ephemeris with Lahiri Ayanamsa — the same standard used by the Government of India's official Panchang — to calculate your precise Tithi, Paksha, ruling planet, and presiding deity, then generates a personalised AI reading based on your complete birth chart.
People often confuse Tithi with Nakshatra, or assume a birth Tithi calculator and a birth star calculator give the same result. They don't — each measures a completely different astronomical relationship:
Together these five form the Panchanga ("five limbs") — the complete set of independent Sun-Moon-calendar relationships used in Vedic timekeeping. Your birth Tithi and your birth Nakshatra are both important but tell you different things: Tithi shapes your emotional and volitional nature through the Sun-Moon relationship, while Nakshatra shapes your deeper psychological patterns and your Vimshottari Dasha timeline.
A Tithi is defined as the time it takes the Moon to gain 12° of angular separation from the Sun, measured in sidereal longitude:
Tithi number = floor( ((Moon longitude − Sun longitude + 360°) mod 360°) / 12° ) + 1
This gives a result from 1 to 30. But unlike a calendar day, a Tithi is not a fixed 24-hour block — its length varies because the Moon's orbit around Earth is elliptical, not circular. The average Tithi lasts about 23 hours 37 minutes, but individual Tithis can run as short as roughly 19 hours 59 minutes near lunar perigee (when the Moon moves fastest, around 15° per day) and stretch to nearly 26 hours 47 minutes near apogee (when it slows to around 11° per day). This is exactly why a Tithi's start and end time shifts every month and can't be read off a fixed table — it has to be computed fresh from the actual planetary positions at your birth moment, which is what AstroWord's Swiss Ephemeris engine does. Traditional Panchangas historically used the mean-motion Surya Siddhanta method for this calculation, while modern almanacs use true longitudes from high-precision ephemerides — the two can differ by several minutes, and in rare cases up to an hour, which is one reason two different Tithi calculators can occasionally disagree near a Tithi's boundary.
In classical Vedic tradition, your real birthday is not your solar (Gregorian) date — it's the annual return of your Janma Tithi, called Tithi Pravesha. This is also how you convert your birthday to the Hindu calendar each year — the date will differ from your Gregorian birthday. Because the Moon's cycle doesn't align neatly with the 365-day solar year, your Tithi birthday drifts to a different Gregorian date most years, occasionally repeating twice or being skipped in a given year (a Kshaya Tithi). Many traditional families still celebrate birthdays, naming ceremonies, and personal pujas on the Tithi Pravesha date rather than the calendar date, believing it more accurately captures the original Sun-Moon relationship present at birth. AstroWord's calculator gives you your exact birth Tithi so you can identify and track this date going forward.
Associated with joy, prosperity, and new beginnings. Favorable for auspicious starts, celebrations, and business ventures.
Associated with stability and growth. Favorable for purchases, relationships, and building long-term foundations.
Associated with victory and courage. Favorable for competition, assertive action, and overcoming obstacles.
Associated with releasing and letting go. Powerful for spiritual practice, clearing obstacles, and deep introspection — not generally chosen for auspicious social ceremonies, but well suited to focused deity worship aligned with these Tithis.
Associated with completeness and fullness. Favorable for spiritual ceremonies, ancestral rites, weddings, housewarmings, and major life milestones.
Each of the 30 Tithis has a ruling planet (Tithi lord) and a presiding deity, per the Narada Purana, that shapes the energy of that lunar day and the personality of those born on it. Some regional traditions use alternate names for the same deity (for example, Ashtami's Rudra is also referred to simply as Shiva) — the underlying deity is unchanged.
Paksha refers to the lunar fortnight — the phase of the moon at birth. This is one of the most important yet overlooked factors in birth chart analysis.
Born during the waxing moon (New Moon to Full Moon). Shukla Paksha births carry outward, expansive, building energy. These individuals tend to be expressive, action-oriented, and naturally oriented toward manifestation and external achievement. The growing light of the moon supports visibility, social connection, and worldly success.
Born during the waning moon (Full Moon to New Moon). Krishna Paksha births carry inward, reflective, releasing energy. These individuals tend to be introspective, spiritually inclined, and naturally oriented toward wisdom, depth, and inner growth. The diminishing light supports contemplation, detachment, and spiritual insight.
Because a Tithi doesn't last exactly 24 hours, it can span across the sunrise of two consecutive days — this is called a Viddha Tithi. When this happens, classical Dharma Shastra rules resolve which day to observe: the day whose sunrise falls within the Tithi generally takes precedence, and where the Tithi is present at both sunrises, the day aligning with the correct Nakshatra is typically preferred. Your birth Tithi itself is fixed by your exact birth moment regardless of this — the Viddha question only matters when deciding which future calendar date to celebrate your Tithi Pravesha (Vedic birthday) on each year.
Janma Tithi is the lunar day (Tithi) on which you were born, determined by the angular relationship between the Sun and Moon at the exact time of birth. Each Tithi spans 12 degrees of the Moon's movement relative to the Sun. There are 30 Tithis in a lunar month — 15 in Shukla Paksha (waxing moon) and 15 in Krishna Paksha (waning moon). Your Janma Tithi is one of the five key elements of Vedic Panchang and significantly influences personality, emotional patterns, and spiritual life.
Enter your date of birth, exact time of birth, and place of birth into AstroWord's free Birth Tithi calculator. The tool uses Swiss Ephemeris to calculate the precise positions of the Sun and Moon at your birth moment, computes their angular difference, and instantly determines your Tithi, Paksha, Tithi category, ruling planet, and presiding deity — along with a personalised AI reading.
Your Hindu calendar birthday is your Tithi Pravesha (or Tithi Pravesh) — the annual return of your Janma Tithi. Enter your birth date, time, and place into AstroWord's calculator to find your Janma Tithi, then track when that same Tithi recurs each year using a Panchang for your city.
Birth Tithi is calculated by finding the angular difference between the Moon's longitude and the Sun's longitude at the exact time of birth, then dividing by 12. AstroWord uses Swiss Ephemeris with Lahiri Ayanamsa — the same standard used by the Government of India — for precise Sun and Moon position calculations. Tithi number = floor((Moon longitude - Sun longitude) / 12) + 1.
A Tithi is defined by degrees of angular separation, not fixed clock time. Because the Moon's orbit is elliptical, its speed varies — around 15° per day at perigee (closest to Earth) versus around 11° per day at apogee (farthest). This makes a single Tithi last anywhere from about 19 hours 59 minutes to 26 hours 47 minutes, averaging around 23 hours 37 minutes, which is why Tithi start and end times must be computed fresh for each date and location rather than read off a static chart.
Tithi measures the angular distance between the Sun and Moon (12° per Tithi, 30 per month) and reflects your emotional and volitional nature. Nakshatra measures which of the 27 lunar constellations the Moon occupies and determines your Vimshottari Dasha sequence. They are calculated independently and answer different questions about your birth chart.
Shukla Paksha (Tithis 1-15) is the waxing moon fortnight from New Moon to Full Moon. People born in Shukla Paksha tend to have outward, expressive, building energy — they are naturally oriented toward growth, manifestation, and external achievement. Krishna Paksha (Tithis 16-30) is the waning moon fortnight from Full Moon to New Moon. People born in Krishna Paksha tend to have inward, reflective, releasing energy — they are naturally introspective, spiritual, and oriented toward wisdom and letting go.
This happens because a Tithi can span the sunrise of two consecutive calendar days — known as a Viddha Tithi. Classical Dharma Shastra rules resolve the ambiguity, generally prioritizing whichever day's sunrise the Tithi is actually present at, or the day that aligns with the correct Nakshatra when the Tithi spans both sunrises.
Tithi Pravesha is the annual return of your Janma Tithi — your true Vedic birthday, as opposed to your solar calendar birthday. Because the lunar cycle doesn't align exactly with the 365-day solar year, this date shifts on the Gregorian calendar each year. Many traditional families celebrate birthdays and personal pujas on this date rather than the fixed calendar date.
Purnima is the 15th Tithi of Shukla Paksha — the Full Moon day. It is the most luminous and complete Tithi. People born on Purnima are associated with abundance, charisma, and a powerful, magnetic personality. Its presiding deity is Chandra (the Moon) and the Tithi falls in the Purna (complete) category. Purnima births are considered highly auspicious in Vedic tradition and are associated with spiritual completeness, generosity, and the ability to inspire others.
Amavasya is the 30th Tithi — the New Moon day, presided over by the Pitrs (ancestral spirits). People born on Amavasya have a deep connection to ancestral energy, intuition, and the unseen realms. Despite popular belief, Amavasya birth is not inauspicious for the individual — rather, it gives strong psychic sensitivity, spiritual depth, and a profound connection to ancestral wisdom.
Ekadashi is the 11th Tithi (in both Shukla and Krishna Paksha), ruled by Mars in Shukla Paksha with Vishwadeva as the presiding deity. People born on Ekadashi are associated with knowledge, wisdom, and spiritual inclination. Ekadashi is one of the most sacred Tithis in Vedic tradition, traditionally observed with fasting. Those born on this day tend to have a natural gift for teaching, sharing knowledge, and spiritual practice.
The 30 Tithis are grouped into 5 categories: Nanda (joyful) — Pratipada, Shashthi, Ekadashi; Bhadra (auspicious) — Dwitiya, Saptami, Dwadashi; Jaya (victorious) — Tritiya, Ashtami, Trayodashi; Rikta (releasing) — Chaturthi, Navami, Chaturdashi; and Purna (complete) — Panchami, Dashami, Purnima/Amavasya. This same five-fold pattern repeats identically in both Shukla and Krishna Paksha.
Each Tithi is ruled by one of the Navagrahas (nine planets), cycling in the order Sun, Moon, Mars, Mercury, Jupiter, Venus, Saturn, Rahu and repeating. The Tithi lord acts like a secondary planetary influence on your personality — similar to how your Moon sign lord shapes your emotional nature. AstroWord's reading explains your specific Tithi lord's influence in detail.
Most Birth Tithi calculators give you the Tithi name and a generic paragraph about it — the same text for every person born on that Tithi. AstroWord's AI combines your Tithi with your Moon sign, Moon nakshatra, Paksha energy, and current Mahadasha to generate a genuinely personalised reading. Two people born on the same Tithi will receive different readings based on their unique chart configuration.