# Zo: Zoroastrian Calendar — Zoroastrian Roj, Mah & More > Modern Zoroastrian calendar for Parsi, Irani, and Zarathushti communities. (iPhone/iPad app by Hanoze Boga.) - Source: https://appshunter.io/ios/app/zo-zoroastrian-calendar/id6761258146 (this page in markdown: same URL + `.md`) - Developer: [Hanoze Boga](https://appshunter.io/developer/1888440806) - Category: Lifestyle, Reference - Price: Free - Rating: 3.50/5 from 2 App Store ratings - Age rating: 4+ - Requires: iOS 15.0 · 58 MB - Languages: American English - Released: 2026-04-24 - Data updated: 2026-09-05 - Monetization: free - User reviews in markdown: https://appshunter.io/ios/app/zo-zoroastrian-calendar/id6761258146/reviews.md ## What is Zo? The Zoroastrian day begins at sunrise, not midnight. Zo Calendar is built around that one fact, and gets the rest of the details right too. Made for Parsi, Irani, and Zarathushti families worldwide, in all three calendar traditions: Shahenshahi, Kadmi, and Fasli. Switch anytime, or compare all three dates with a single tap. TODAY'S ROJ, COMPUTED PROPERLY Your Roj and Mah, resolved from the real sunrise of the city you choose, with the Roj Yazata's theological meaning, the prayers traditionally associated with the day, and artwork for every Roj of the month. LIVE GEH TIMES The five daily prayer periods, live on your calendar. Havan, Rapithwin, Uzirin, Aiwisruthrem, and Ushahin, with today's exact start and end times and a countdown to the next. Tap any Geh for its presiding Ratu, associated Yazatas, and recommended prayers. Biji Havan is handled correctly, absorbing Rapithwin's prayers when Rapithwin falls dormant. Optional reminders at the start of each Geh you choose. MOON PHASES: PUNAM, AMAS, CHANDRAT Punam (Full Moon), Amas (No Moon), and Chandrat (the first crescent), shown on the day itself and explained on its detail screen. CHOGHADIYA 16 periods a day, eight by day and eight by night, colour coded by auspiciousness, with Amrit, Shubh, and Labh highlighted for ceremonies, travel, business, and new beginnings. EVENTS: SACRED DAYS AND ANNIVERSARIES One tab for everything the calendar marks, month by month, filtered to exactly what you observe: Sacred Days, Fire Temple Anniversaries, Priest Anniversaries, Community Baj, and Moon Phases. Sacred Days: Navroz, Khordad Sal, Muktad (Farvardigan), all six Gahambars, the five Gatha days, Pateti, and Jashan days, each with its spiritual significance, food traditions, and prayers. Persian heritage festivals available as an optional overlay. Sacred Anniversaries: all eight Atash Behrams and over 50+ Atash Adarans, with founding year and city for each, plus priest commemorations and community Baj. Notifications narrow to the regions you care about. Roj and Mah doctrinally validated, disputed entries withheld until priestly confirmation. MY MOMENTS Your own tab for the dates that are personal. Roj birthdays, Baj remembrances, Navjote and wedding anniversaries, reminded on the correct Roj every year rather than a fixed Gregorian date. Gatha born family members are handled correctly. Moments need a free sign in with Google or Apple, which is what keeps them backed up and waiting on every device you use. Everything else in Zo Calendar works as a guest, no account required. 70+ CITIES, NO GPS Choose from 71 cities across 36 timezones and every calculation follows you. Change your city and the Geh times, Choghadiya, sunrise, and Roj all update instantly. No location permission, ever. ALSO IN THE APP A considered dark theme, built for real contrast rather than a colour inversion, alongside light and system-follows. Reminders you can tune category by category, at a time you choose. A built-in FAQ covering the calendar systems, Geh accuracy, Choghadiya, and privacy. And Export My Data, because your Moments are yours to take with you. A home screen widget keeps today's Roj and its artwork one glance away, refreshed at your city's sunrise rather than at midnight. Works fully offline, and syncs when you are back online. No ads, no data sold, no tracking. Built to get the details right. ## Key features - Supports Shahenshahi, Kadmi, and Fasli calendars - Daily Roj and Mah with spiritual significance - Calculates Geh prayer periods based on sunrise/sunset - Highlights Choghadiya auspicious times - Tracks moon phases - Lists sacred observances and festivals - Includes fire temple anniversaries ## Frequently asked questions about Zo ### Does Zo Calendar have ads? No, Zo Calendar is ad-free, allowing for an uninterrupted user experience. ### What calendar systems does Zo Calendar support? Zo Calendar supports three main Zoroastrian calendar systems: Shahenshahi, Kadmi, and Fasli, allowing users to switch between them easily. ### How does Zo Calendar calculate prayer times? The app calculates Geh prayer periods and Choghadiya auspicious times based on your city's local sunrise and sunset, providing accurate, location-specific information. ### Can I use Zo Calendar offline? Yes, Zo Calendar works offline, ensuring you can access important dates and information even without an internet connection. ### What special observances does Zo Calendar include? Zo Calendar includes a wide range of sacred observances and festivals such as Navroz, Khordad Sal, Muktad Farvardigan, Gahambars, and various Jashan days, along with their significance and traditions. ### Does Zo Calendar provide information on fire temples? Yes, Zo Calendar lists sacred anniversaries for Atash Behrams and Atash Adarans across various locations, including their founding years and cities, with notifications for Salgirah days. ### What is the age rating for Zo Calendar? Zo Calendar has an age rating of 4+, making it suitable for children and adults alike. ### How often is Zo Calendar updated? The latest version of Zo Calendar is 1.0.7(56), last updated on 2026-07-14, indicating regular updates to expand its content and features. ## Version history (last 5 releases) ### 1.0.10(64) — 2026-09-01 Fixed a problem where the day-before reminder for your Moments was not arriving. ### 1.0.9(63) — 2026-08-10 *Google Sign-In Fix* Some users were unable to sign in via Google Sign-In. This has now been resolved and sign-in should work seamlessly. *General* Additional stability improvements and performance enhancements for a smoother experience. ### 1.0.7(56) — 2026-07-14 This update brings some of our most requested features to Zo Calendar! GEH Know exactly which of the five daily prayer-periods you're in, right on your Calendar homepage. Set reminders for each one so you never miss a Geh. MOON PHASES Punam, Amas, and Chandrat are now tracked automatically and calculated for your city, right on your calendar. EVENTS TAB Browse every Sacred Day, Fire Temple Anniversary, Priest Anniversary, and Moon Phase across the whole year in one place, with category filters to find exactly what you're looking for. MY MOMENTS Save up to 15 Moments now, more room to mark the birthdays and anniversaries that matter to you. Thank you for being part of the Zo Calendar community. As always, we welcome your feedback. ### 1.0.6(47) — 2026-05-24 • 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 ### 1.0.5(44) — 2026-05-11 *Important Updates* •⁠ ⁠Reminders now deliver reliably on your phone •⁠ ⁠Same reminder no longer fires multiple times in one session •⁠ ⁠CX Polishing & tighter behind-the-scenes telemetry •⁠ ⁠Performance & usability fixes ## Related topics [zoroastrian almanac](https://appshunter.io/ios/topics/zoroastrian-almanac) · [fasly](https://appshunter.io/ios/topics/fasly) --- *Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-09-05.*