Getting a Working Facts Of The Day Calendar Into Your Workflow
I spent way too long trying to build a reliable daily facts system from scratch. I ended up with a Python script that scraped Wikipedia's "On This Day" page, parsed HTML with BeautifulSoup, and wrote output to a Google Calendar using gcalcli. The whole thing broke every time Wikipedia changed its markup — which is basically weekly at first, then less often once they settled into a new structure. I wasted about three weekends debugging that. The real lesson was that maintaining your own scraping pipeline for a facts calendar is not worth the effort unless you enjoy that kind of pain. The better approach, at least for most people, is to use an existing Facts Of The Day Calendar resource and import it rather than build one yourself. There are a few reliable sources. The one I end up returning to is the free ICS feed hosted at factsoftheday.io or the equivalent open-source mirrors on GitHub. These generate a single .ics file you can subscribe to in any calendar app — Google Calendar, Apple Calendar, Outlook, whatever you use.
How to Add a Facts Of The Day Calendar to Your Existing Calendar
Start by downloading the .ics file from one of the publicly shared repositories. I usually grab mine from the GitHub mirror at github.com/calebfitzpatrick/facts-of-the-day-calendar because the releases page has versioned exports that don't shift around. Once you have it, open your calendar app and look for the option to add a calendar from a file or URL. In Google Calendar that is under Settings -> Add Calendar -> Import. In Apple Calendar it is File -> New Calendar Subscription and you paste the direct .ics URL. The import takes about 30 seconds for a full year of events. Each event is titled with the date and a short fact — something like "January 15 — The first ever SMS message was sent in 1992." You will get a notification if your calendar app supports all-day event alerts, but most people just see the fact when they open their day view. That is fine. It is not meant to interrupt you. It is meant to be there when you are already looking at your schedule.
What People Miss About These Calendars
The first thing beginners miss is that most facts-of-the-day calendars are generated from a fixed database. The data does not update after the export is made. If the author releases v2025.03 and you downloaded v2025.01, you are stuck with the older facts until the author publishes a new version and you re-import. I learned this the hard way when I noticed the calendar still had a fact about a 2023 sports event that was clearly outdated. The workaround is simple: subscribe to the feed URL instead of downloading a static file whenever possible. Feeds refresh automatically. Static .ics files do not. The second thing people miss is that not all facts are equal quality. Some calendars pull from curated historical databases and produce accurate entries. Others run automated generators that occasionally produce wrong or misleading statements. I once had a calendar event claim that Nikola Tesla invented the lightbulb. That is not correct, and it ruined my credibility when I showed the calendar to a colleague who actually knew history. The fix is to pick a calendar source that cites its references or is maintained by a known educational organization. Look for ones that link back to primary sources or use Wikipedia-as-source with inline citations.
Get the Full Details
Download and Setup Details
Here is the direct link I use for the latest stable release: facts-of-the-day-calendar releases on GitHub. Download the .ics file for the current year. The file is usually under 200 KB, which means it imports fast and does not slow down your calendar app. If you want to customize which facts show up, the open-source version lets you edit the JSON data file before generating the ICS. You remove entries you find boring or inaccurate, add your own, then run the build script. It outputs a clean .ics in under a minute on a normal machine. I keep my customized version checked out in a local repo so I can push updates without losing my edits.
Known Limitations
These calendars have real bottlenecks. First, they are text-only. You cannot attach images, videos, or audio to the events in most calendar apps without jumping through extra steps. Second, the fact database is finite. After you cycle through a full year, you either get the same facts again or you run out if the calendar only covers a single year. Third, time zone handling is inconsistent across sources. Some events are timestamped in UTC, some in local time, and a few are marked as all-day events without any time component. If you travel across zones frequently, you will notice the facts shifting to different dates on your phone versus your laptop. For those cases, I recommend pairing the Facts Of The Day Calendar with a second source that handles time zones better, or switching to a web-based daily facts widget that renders in your browser timezone rather than a synchronized calendar event. The widget approach at sites like oldtimefacts.com or timeanddate.com gives you better timezone behavior, though it is less convenient if you want push notifications. The whole system works well enough for casual use. It is not a replacement for a proper educational tool, but it is better than nothing if you want a steady stream of trivia sitting in your calendar without setting anything up manually.
