I’ve been self-hosting my own calendar infrastructure for a while now. CalDAV, Radicale, the whole stack. It works. But the one thing I could never get right was the client. Every calendar app I tried either wanted me to route everything through their servers, locked me into a single ecosystem, or just didn’t handle shared calendars well.
So I built one.
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Update (April 2026): Since writing this post, I built Caffeinated Calendar, which connects directly to Radicale and any CalDAV server alongside Google, iCloud, Outlook, and Zoho. It has full CalDAV task support and replaced both OneCalendar and Tasks.org for me. The Radicale setup below still applies. Jump to the update.
I’ve been gradually replacing various commercial and/or closed source cloud services with self-hosted alternatives. I’ll start posting about more of them in the very near future, but the one I decided to replace this weekend was Todoist.
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