Zo Calendar

Zo Calendar is the modern Zoroastrian calendar for Parsi, Irani, and Zarathushti communities worldwide. Whether you follow Shahenshahi, Kadmi, or Fasli, Zo Calendar keeps you connected to your faith and traditions every day.

Not a Gregorian calendar with holidays pasted on. Zo Calendar computes the Roj the traditional way, from the real sunrise of your city, because the Zoroastrian day begins at sunrise, not midnight.

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THREE CALENDAR SYSTEMS, ONE APP

• Shahenshahi: the traditional calendar followed by most Parsi families in India
• Kadmi: the reform tradition running 30 days ahead of Shahenshahi
• Fasli: the seasonal calendar aligned with the spring equinox, followed widely in Iran

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DAILY ROJ AND MAH

• Today's Roj (day) and Mah (month) in your chosen calendar
• The Roj Yazata: guardian divine being of the day, and its cosmic meaning
• Beautiful artwork for every Roj
• The prayers traditionally associated with the day

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LIVE GEH TIMES

The five daily prayer periods of the Zoroastrian day, live on your calendar. A first for any Zoroastrian app.

• Havan, Rapithwin, Uzirin, Aiwisruthrem, and Ushahin, with exact start and end times for today
• A live countdown to the next Geh
• Tap any Geh for its presiding Ratu, associated Yazatas, and recommended prayers
• Biji Havan handled correctly: when Rapithwin is dormant, Havan absorbs its prayers
• Optional reminders at the start of each Geh you choose

Computed from your city's real sunrise and sunset, so the times shift every day.

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MOON PHASES: PUNAM, AMAS, CHANDRAT

• Punam (Full Moon), Amas (No Moon), and Chandrat (the first crescent)
• Marked on the day itself and explained on its detail screen

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CHOGHADIYA: AUSPICIOUS TIMES

• 16 daily periods (8 day, 8 night), colour coded by auspiciousness
• Amrit, Shubh, and Labh highlighted for ceremonies, travel, and new beginnings
• A live countdown to the next period

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EVENTS: EVERY SACRED DAY IN ONE PLACE

The Events tab lists Sacred Days, Salgirahs, priest commemorations, and Moon Phases month by month, filtered to what you observe.

Sacred Days
• Navroz: the Zoroastrian New Year
• Khordad Sal: the birthday of Prophet Zarathushtra
• Muktad (Farvardigan): the sacred 10 day remembrance of departed souls
• All six Gahambars, the seasonal festivals of thanksgiving
• The five Gatha days, Pateti, and Jashan days when Roj and Mah share the same name
• Persian heritage festivals: Sadeh, Yalda, Tirgan, and Mehregan, as an optional overlay

Each observance explains its significance, food traditions, and prayers.

Sacred Anniversaries
• All eight Atash Behrams, from Iranshah in Udvada to the three in Mumbai
• Multiple Atash Adarans across Mumbai, Gujarat, Maharashtra, South India, and beyond
• Founding year and city for each, plus priest commemorations and Baj
• Region by region notifications for the temples that matter to you
• Roj and Mah doctrinally validated, disputed entries withheld until priestly confirmation

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MY MOMENTS

• Roj birthdays, on the correct Roj every year rather than a fixed Gregorian date
• Baj remembrance days for loved ones who have passed
• Navjote, wedding, and other anniversaries
• Reminders so a date is never missed, with Gatha born relatives handled correctly

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YOUR CALENDAR TRAVELS WITH YOU

Over 70+ cities across 35+ timezones. Change your city and the Geh times, Choghadiya, sunrise, and Roj all update instantly. No location permission, ever.

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TODAY'S ROJ ON YOUR HOME SCREEN

A home screen widget with today's Roj and artwork, refreshed at your city's sunrise, not midnight. Light and dark themes, both built for real contrast. Works fully offline, and syncs when you are back online. No ads, no data sold, no tracking.

Built to get the details right.