ஆதன்Aathan Tamil Calendar
Tamil Panchangam, Rasi Palan, Muhurtham dates, Jathagam, and Porutham — all calculated with one consistent Swiss Ephemeris engine from 1950 to 2100. Works offline, no login required.
Aathan Tamil Calendar
ஆதன்
Every Panchangam Tool, One Consistent Engine
Daily panchangam, muhurtham, rasi palan, jathagam, and porutham — all calculated the same way, every single day from 1950 to 2100.
Daily Panchangam
Thithi, Natchathiram, Yogam, and Karanam with exact start and end times, plus Chandrashtamam and sun/moon nakshatra tracking.
Nalla Neram & Rahu Kalam
Nalla Neram, Rahu Kalam, Yamagandam, Kuligai, and Gowri Panchangam for every day.
Muhurtham Finder
Auspicious dates computed from real classical exclusion rules — separate categories for Marriage, House-Warming, Business Opening, Vehicle Purchase, and Farming.
Rasi Palan & Peyarchi
Daily, weekly, and monthly Rasi Palan for all 12 signs, plus Guru and Sani Peyarchi tracking personalized to your 27-nakshatra birth star.
Jathagam
Birth chart (horoscope) generation built on the same Swiss Ephemeris engine as the daily panchangam.
Porutham
Marriage compatibility matching to check porutham between two birth details.
Vasthu Tips
Vasthu guidance alongside your daily panchangam and muhurtham planning.
Festivals & Holidays
Full Hindu festival calendar with region-aware public holidays for India, Sri Lanka, Singapore, Malaysia, UAE, USA, UK, Canada, and Australia.
Fasting & Vrat Reminders
Reminders for Ekadasi, Pradosham, and other fasting days so you never miss one.
Day Notes
Add personal notes and reminders to any date — stored only on your device.
150 Years of Coverage
Every calculation — panchangam, muhurtham, and horoscope — available consistently from 1950 through 2100.
Tamil, English & Tanglish
Switch between Tamil, English, and Tanglish (Tamil in English script) anytime from Settings.
Works Fully Offline
Panchangam data is bundled on your device and syncs automatically when online — no waiting, no data charges to check tomorrow's thithi.
No Login, No Data Collection
No account required and no personal information collected. Your notes and reminders never leave your device.
Why Aathan Is Different
Most Tamil calendar apps mix a fixed almanac for the daily calendar with a separate method for horoscopes. Aathan uses one consistent engine for everything.
| Capability | Typical Tamil Calendar App | Aathan |
|---|---|---|
| Panchangam and horoscope from the same calculation engine | ||
| Muhurtham dates computed from real exclusion rules, not a static list | ||
| Peyarchi personalized to your 27-nakshatra birth star (not just rasi) | ||
| Jathagam and Porutham included | ||
| Region-aware holidays for 9 countries | ||
| No login or account required | ||
| Works fully offline after first sync |
Aathan Tamil Calendar Highlights
One consistent Swiss Ephemeris engine for panchangam and horoscope calculations, every day from 1950 to 2100 — no switching methods between the daily calendar and jathagam.
Muhurtham Finder built on real classical exclusion rules (Rikta tithi, Guru Asta, Aadi/Margazhi masam, weekday exclusions) — not a static list of "auspicious days."
Daily Panchangam with Thithi, Natchathiram, Yogam, Karanam, Nalla Neram, Rahu Kalam, Yamagandam, Kuligai, and Gowri Panchangam.
Rasi Palan and Peyarchi for all 12 signs, with Guru and Sani transit tracking personalized down to your 27-nakshatra birth star.
Jathagam (horoscope) and Porutham (marriage compatibility) included alongside the daily calendar.
Region-aware festivals and public holidays for India, Sri Lanka, Singapore, Malaysia, UAE, USA, UK, Canada, and Australia.
Fasting and vrat reminders for Ekadasi, Pradosham, and other observances.
Works fully offline — panchangam data is bundled on-device and syncs automatically when online.
No login and no personal data collection — notes and reminders stay on your device.
Tamil, English, and Tanglish — switch languages anytime from Settings.
Frequently Asked Questions
What calculation method does Aathan Tamil Calendar use?
Aathan uses one consistent engine — Swiss Ephemeris — for every day from 1950 through 2100, for both the daily panchangam and horoscope calculations. Many other Tamil calendar apps mix a fixed almanac method for the daily calendar with a separate calculation method for horoscopes, which can create inconsistencies.
How does the Muhurtham Finder decide auspicious dates?
Instead of a static list, Aathan computes muhurtham dates from classical exclusion rules — Rikta tithi exclusion, Guru Asta (Jupiter combustion), Aadi and Margazhi masam exclusions, and weekday exclusions — with separate categories for Marriage, House-Warming, Business Opening, Vehicle Purchase, and Farming.
Does Aathan include Jathagam and Porutham?
Yes. Aathan includes a Jathagam (birth chart) screen and a Porutham (marriage compatibility matching) screen alongside the daily panchangam and muhurtham tools.
Does Aathan work for Tamils living outside India?
Yes. Panchangam calculations are based on Chennai, Tamil Nadu, and the app shows region-aware festival and public holiday data for India, Sri Lanka, Singapore, Malaysia, UAE, USA, UK, Canada, and Australia.
Is Aathan Tamil Calendar free, and does it need an account?
Yes, it's free with no login or account required. No personal information is collected — notes and reminders you add stay on your device.
Does Aathan Tamil Calendar work offline?
Yes. Panchangam data is bundled on your device and syncs automatically when you're online, so you can check any date without waiting or using data.
What languages does Aathan support?
Tamil, English, and Tanglish (Tamil written in English script) — switch anytime from Settings.