open source software, software development, college hoops, and other stuff
Software
If you’ve ever tried to run a busy calendar on WordPress, you’ve probably hit the wall. Most calendar plugins store every event as a WordPress post, and somewhere past a few hundred events the admin slows to a crawl — with the front end not far behind. For a small events page that’s fine. For […]
Python
A few weeks ago I typed this into a terminal: “Set up a recurring team standup on weekday mornings, but skip Fridays.” A couple of seconds later my calendar showed a proposed event — and then it stopped and waited. It didn’t save anything. It showed me the fully expanded recurrence (every occurrence, in my […]
Go
Years ago I wrote ILib, a small C library for reading, drawing on, and saving images. It has always been one of my favorite little projects — simple, dependency-light, and genuinely handy. Recently I ported it to Go as ilibgo, and along the way it picked up a few new tricks I’m excited to show […]
Software
Here’s something I’ve wanted for a long time: asking my calendar questions in plain English. As of WebCalendar 1.9.16, you can. WebCalendar now ships an MCP server — Model Context Protocol support — so you can connect an AI assistant like Claude directly to your self-hosted calendar and say things like “What’s on my calendar […]
Software
A practical comparison of the best open-source, self-hosted Google Calendar alternatives in 2026 — Nextcloud, Radicale, Baikal, SOGo, DAViCal, and WebCalendar — and how to choose the right one.
Python
I’m excited to share my latest project: k5n-mcp-hub, a small, local-first hub for the MCP servers you build and run on your own machine. The code, docs, and a Dockerfile are on GitHub: https://github.com/craigk5n/k5n-mcp-hub The Model Context Protocol (MCP) has quickly become the way to connect AI assistants to tools, data, and services. If you […]
News
I’m excited to share that my new open-source library, php-icalendar-core, is now available on GitHub: https://github.com/craigk5n/php-icalendar-core This is a clean, modern, zero-dependency PHP 8.2+ library for parsing and writing iCalendar (.ics) data according to RFC 5545, with strong support for recurrence rules (RRULE), timezones, and even forward-compatible rich-text descriptions via STYLED-DESCRIPTION (RFC 9073). Table of Contents […]
News
So, the updated UI effort is underway, and I’m making good progress. WebCalendar has a lot of legacy CSS/Javascript that was in need of updating. After all, some of the code for WebCalendar is now 20 years old! Along the way, I’m replacing some of the old PHP code as well while I am refactoring […]
Downloads
This 1.3.0 (15 Mar 2019) release of WebCalendar is the latest stable maintenance release. Changes for this release focus on bug fixes, security improvements and PHP 7.2 compatibility. (Note: This version does not work with PHP 8.) Download the release from Github: WebCalendar-1.3.0.tar.gz (1.55 Mb) WebCalendar-1.3.0.zip (1.76 Mb) The list of changes include the following […]