Mnestik – Digital long-term memory across four calendars

Summary: Mnestik is a web-based reminder app that supports Gregorian, Julian, Jewish, and Islamic calendars, converting events into time capsules with flexible multi-step reminders to enable advanced planning across different calendar systems.

What it does

Mnestik organizes events from four calendar systems on a unified timeline and applies customizable reminder patterns with individual lead times instead of single-day alerts. It allows addressing reminders to individuals or groups for targeted notifications.

Who it's for

It is designed for users managing recurring personal, cultural, or religious events and groups needing coordinated reminders across diverse calendar systems.

Why it matters

Mnestik solves the problem of overlooked or late preparations by enabling early, flexible reminders for important deadlines and events spanning multiple calendar traditions.