See Aathan in Action
Real screens from the app — month view, full day panchangam, festivals, and settings.
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.
Free on Android and iOS — available on Google Play and the App Store for iPhone and iPad.
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.
What makes Aathan the best Tamil calendar app for 2027?
Aathan calculates Panchangam, Rasi Palan, Muhurtham, Jathagam, and Porutham for 2027 using one consistent Swiss Ephemeris engine instead of mixing methods, computes muhurtham dates from real classical exclusion rules instead of a static list, and personalizes Peyarchi down to your 27-nakshatra birth star — with no login and no personal data collected.
Is there a Tamil calendar app for 2027 that covers more than just one year?
Yes. Aathan covers 2027 as part of a continuous 1950-to-2100 range, calculated the same consistent way throughout — so festival dates, muhurtham, and panchangam details for 2027 use the same engine as every other year, not a separate yearly update.
Is Aathan Tamil Calendar available on iPhone and iPad?
Yes. Aathan is free on the App Store for iPhone and iPad (iOS 15.0 or later), with the same Panchangam, Rasi Palan, Muhurtham, Jathagam, and Porutham calculations as the Android version.