Zo Calendar

Zo.Apps

About this app

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

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THREE CALENDAR SYSTEMS, ONE APP

Zo supports all three Zoroastrian calendar traditions:

• 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, used widely in Iran

Switch between them instantly from your calendar settings.

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DAILY ROJ & MAH

Every day in Zo shows you:

• Today's Roj (day name) and Mah (month) in your chosen calendar
• The Roj Yazata: guardian divine being of the day, with theological and cosmic meaning
• Beautiful Roj artwork that brings each day's identity to life
• Compare all three calendar dates with a single tap

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SACRED DAYS

Never miss an important Zoroastrian observance again:

• Navroz: Zoroastrian New Year celebrations
• Khordad Sal: birthday of Prophet Zarathushtra
• Muktad (Farvardigan): the sacred 10 day All Souls remembrance
• All six Gahambars: Maidyozarem, Maidyoshem, Paitishahem, Ayathrem, Maidyarem, Hamaspathmaidyem
• Gatha Days: the five sacred hymn days
• Pateti: the day of reflection and repentance
• Jashan days: when the Roj and Mah share the same identity
• Persian heritage festivals: Navroz, Sadeh, Yalda, Tirgan, Mehregan (optional)

Each observance includes its spiritual significance, food traditions, prayer obligations, and associated rituals.

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SACRED ANNIVERSARIES: FIRE TEMPLE SALGIRAHS

A first for any Zoroastrian app: Salgirah dates for India's historic Atash Behrams and Atash Adarans.

• Atash Behrams across Udvada, Navsari, Surat, and Mumbai
• Atash Adarans across Mumbai, Surat, Gujarat, Maharashtra, and the diaspora
• Founding year and city for each fire temple
• Salgirah-day notifications, available for every panth
• Roj and Mah doctrinally validated; disputed entries withheld until priestly confirmation

A growing canon, expanding with every release.

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CHOGHADIYA: AUSPICIOUS TIMES

Plan your day with the ancient Choghadiya timing system:

• 16 daily periods (8 day, 8 night) colour coded by auspiciousness
• Know the best times for ceremonies, travel, business, and new beginnings
• Amrit, Shubh, and Labh periods highlighted for important activities
• Calculated from actual sunrise and sunset at your location

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YOUR SPECIAL MOMENTS

Track the dates that matter to your family:

• Roj Birthdays: celebrate your birth Roj every month
• Baj: annual remembrance days for loved ones who have passed
• Custom anniversaries: Navjote dates, wedding anniversaries, and more
• Reminders so you never forget an important family date
• Cloud sync keeps your moments safe across devices

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TODAY'S ROJ ON YOUR HOME SCREEN

What’s new

• You now have 10 Moments (up from 5)
• 22 new cities, with smarter "Nearest to you" picking
• Dark mode revamped for cleaner contrast
• Moments tab grouped by Today and Upcoming
• Sacred Day notifications and reminders more reliable
• Small visual and stability fixes