Almaniac: A Calendar Converter

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.