Other projects
Bitcoin Calendar is part of the 21ideas ecosystem. We also build projects that help you explore Bitcoin, follow the news and stay informed about security.
21ideas ecosystem
21ideas
An open library of Bitcoin knowledge: books, articles and practical guides, from your first steps to deeper study.
GM Bitcoiner
A daily Bitcoin digest bringing together important news, developments and events in one edition.
Security Watcher
Vulnerabilities and security incidents across the Bitcoin ecosystem: what happened, who is affected and what steps are available.
Website and Telegram in Russian.
Get in touch
Suggest an event, report an error or discuss an idea through Nostr or GitHub. For a historical event, include its date, a short description and links to primary sources.