Bitcoin Calendar migrated to SQLite database and enabled API queries

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Bitcoin Calendar migrated to SQLite databse, which greatly improves efficiency and allows to query events by tag, date, range, and so on.
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The project also now supports API calls (for inter-app communications for now), external API calls will become available in Q3.
Next step – setting up own web archive to ensure no Bitcoin historical reference is ever lost.
See details on https://bitcoin-calendar.org/