A zero-infla trick uses URL-based deeplinks for adding events to Google Calendar and similar Outlook actions, avoiding file-based steps for certain interactions.

Hosting with proper MIME types is essential on static hosts; a Cloudflare Pages headers file ensures ICS is served as text/calendar while JSON API files use application/json.

The piece highlights RFC 5545 pitfalls, including all-day event handling where DTEND is exclusive, CRLF line endings, 75-byte line folding for long lines, and proper escaping of text content, accompanied by a folding function to respect byte-length constraints.

Localization is treated as a craft: each locale uses hand-crafted strings to avoid duplication and maintain correctness across languages.

The article provides concrete examples, user-facing details, and practical code for line folding, UID stability, and URL-based event creation, culminating in actionable takeaways and an invitation for questions.

The author explains shipping a subscribable calendar-feeds feature for a static site without a backend by emitting ICS and JSON files during the build, maintaining a single source of truth between site data and feeds.

During build, the emitter traverses holiday data to generate ICS feeds (per-year, per-holiday, and all-years) and accompanying JSON API feeds, writing them to the output folder.

The project centers on a single, authoritative data source—holiday JSON—that feeds the UI, ICS feeds, and the API to prevent drift, with concrete live URLs for Calendana and clear examples of feed JSON and ICS outputs.