# Convert all calendar formats

> Convert all calendar formats (iPhone/iPad app by 宁 许.)

- Source: https://appshunter.io/ios/app/convert-all-calendar-formats/id6801018827 (this page in markdown: same URL + `.md`)
- Developer: [宁 许](https://appshunter.io/developer/6784333872)
- Category: Utilities
- Price: Free
- Age rating: 4+
- Requires: iOS 16.0 · 16 MB
- Languages: Chinese (Simplified, China)
- Released: 2026-08-27
- Data updated: 2026-09-21
- User reviews in markdown: https://appshunter.io/ios/app/convert-all-calendar-formats/id6801018827/reviews.md

## What is Convert all calendar formats?

Convert all calendar formats is a professional, user-friendly all-in-one calendar conversion tool for global users. It solves the hassle of mismatched and confusing multi-calendar dates, delivering fast, precise, and reliable one-click date conversion for daily use, scheduling, international communication, travel, and academic research. Whether you need to check traditional festivals, arrange schedules, or convert professional historical and religious dates, this app covers all your calendar conversion demands with stable and accurate performance.
Supporting almost all mainstream global calendar systems, it includes Gregorian Calendar, Chinese Lunar Calendar with solar terms and traditional festivals, Julian Calendar, Islamic Hijri Calendar, Persian Calendar, Japanese Calendar, Korean Calendar, and more. It not only realizes mutual conversion between different calendars but also supports accurate identification of lunar birthdays, religious festivals, historical dates and special time nodes, far exceeding the limited functions of ordinary calendar tools.
Powered by a professional and authoritative calendar algorithm database, the app accurately identifies leap years, leap months, solar term rules and unique festival calculation logic of each calendar system. It effectively avoids conversion errors, ensuring all converted dates and time nodes fully comply with official astronomical and calendar standards, providing trustworthy data for daily arrangement and professional scenarios.
Featuring a clean, ad-free and intuitive interface, the app requires no complicated operations. You can complete accurate calendar conversion with one tap and view real-time clear results. It automatically saves conversion records for repeated query and use. All core functions support offline use, allowing you to convert various calendar dates stably and conveniently anytime and anywhere without network access.
Ideal for students, researchers, international business practitioners, cross-border travelers and daily users, Convert all calendar formats perfectly combines comprehensiveness, accuracy and simplicity. Get rid of tedious manual date checking and enjoy effortless, instant multi-calendar conversion with this lightweight and practical calendar assistant.


## Version history (last 1 release)

### 1.0.0 — 2026-08-27

No release notes.

## More apps by 宁 许

- [Time Master Converter](https://appshunter.io/ios/app/time-master-converter/id6784566827)
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- [daily Multi-Purpose Calculator](https://appshunter.io/ios/app/daily-multi-purpose-calculator/id6791077665)
- [Timer Master-Real and reliable](https://appshunter.io/ios/app/timer-master-real-and-reliable/id6792603547)

All apps by 宁 许: https://appshunter.io/developer/6784333872

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*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 2026-09-21.*