Almaniac: A Calendar Converter
Many calendars, one date
Free · In‑App Purchases · Designed for iPad. Not verified for macOS.
See the same date in many calendars at once: in their native scripts.
Almaniac is a multi-calendar converter for historians, students, and anyone curious about how the world keeps time. Pick a date and compare Gregorian, Julian, Hebrew, Islamic, Persian, Chinese, Maya, and more on a single screen.
MANY CALENDARS AT ONCE
No switching between source and target. Every calendar updates together as you move through dates.
NATIVE SCRIPTS
Dates appear in Arabic, Hebrew, Chinese, and Devanagari with proper typography: not just romanized text. Toggle transliteration when you prefer English month names.
RELIGIOUS HOLIDAYS
Major Christian, Jewish, and Islamic holidays appear on the dates they fall. Turn each tradition on or off in settings.
ANCIENT & HISTORICAL DATES
Jump to any year by typing it, including BCE dates. Reach 100 BCE without endless scrolling.
LEARN EACH CALENDAR
Tap any calendar for its history, solar or lunar type, and an interactive map of where it is used today.
MAKE IT YOURS
Show, hide, and reorder calendars. Choose distinct, mono, or sepia themes. Light and dark mode. Home screen widgets.
BUILT FOR PRIVACY
No ads. No accounts. No tracking. Works fully offline.
CALENDARS INCLUDED
Gregorian, Julian, Ethiopian, Coptic, Chinese, Japanese, Minguo, Soviet, French Republican, Maya, Islamic, Hebrew, Persian, Baháʼí, Thai Buddhist, Bengali, ISO Week, Discordian, Indian Civil, and Julian Day.
• Fixed modal close buttons and backdrops so taps no longer pass through to calendars behind dialogs
• Improved stability when switching color themes or light/dark mode
• French Republican: rural day names, décade weekdays, and sans-culottides feasts in the list and date picker
• Persian / Shahanshahi: optional Zoroastrian traditions and daily Javidnam (settings toggles)
• Lock Screen widget layout improvements
The developer, Christopher Engelsma, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Collected
The developer does not collect any data from this app.
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Christopher Engelsma
- Size
- 15.1 MB
- Category
- Utilities
- Compatibility
Requires iOS 15.0 or later.
- iPhone
Requires iOS 15.0 or later. - iPad
Requires iPadOS 15.0 or later. - iPod touch
Requires iOS 15.0 or later. - Mac
Requires macOS 12.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later.
- iPhone
- Languages
- English
- Age Rating
4+
- 4+
- In-App Purchases
Yes
- Big Tip $5.99
- Medium Tip $2.99
- Small Tip $0.99
- Copyright
- © 2026 Chris Engelsma