Privacy
Last updated 18 August 2026.
Common Calendar doesn't collect much, mostly because it doesn't need to. You never sign in, so we have no idea who you are.
What we don't do
- No accounts, no passwords, nothing to sign up for.
- No ads. We don't sell or share anything with anyone.
- No tracking cookies.
- We never ask for your name, email, or Eagle ID.
- Your browser remembers two small things: that you've already seen the opening screen, and whether you picked light or dark mode. Both stay on your device and say nothing about who you are.
- Dark mode, search, and a weekly roundup panel are still being tested and aren't on by default. Someone helping us test one can turn it on from their browser's developer console — that choice is remembered the same way, on their device only.
- If search is turned on, what you type into it is never sent anywhere or saved — it only filters what's already on your screen, on your device.
The dark mode choice is the one cookie this site sets. It holds a single word, “light” or “dark,” goes nowhere but back to us, and isn't used to identify or track you. Nothing else here uses cookies.
Anonymous usage counts
When you interact with the calendar — open an event, change a filter, search, export to your own calendar — we record that it happened, so we can tell which parts of the site actually get used. Alongside that, your browser generates a random id for itself and sends it along, so a return visit can be recognized as the same device as before. That id lives only in your browser's own storage, was never assigned to you by us, carries no other information, and is not combined with your name, your IP address, or anything else that could identify you. Clearing your browser data resets it to a stranger.
We use it only to compute rough, aggregate numbers — how many visits are returning ones, how often people open an event at all — on a page a small number of us can see, protected by a password. Nobody can look up what one particular device did.
Feedback
The feedback form is anonymous. It saves three things: your title, your message, and which page you were on when you sent it. There is no field for who you are, which is also why we can't write back.
Please don't put anything private in it. The students who run this site read everything that comes through.
Analytics
We keep counts of how the site gets used: which pages people visit, which parts of the calendar are worth keeping, and whether anything loads slowly. That's how we decide what to fix. Some of it is handled by Vercel Web Analytics and Speed Insights, and some is stored in our own database alongside the events.
None of it is personal data. There are no cookies and no ID that lasts between visits, so what we end up with are totals. We can see that something was used. We can't see who used it, follow you from one visit to the next, or track you anywhere else on the internet.
Event information
Events come from BC's own public listings, mostly EagleSync's feed, plus a few we type in by hand. They're descriptions of public events, not information about people.
If your event is up here and you'd rather it wasn't, send a note through the feedback form and we'll take it down.
Hosting
Vercel hosts the site and Supabase stores the data. Both keep normal server logs for a while, which include IP addresses. We don't use those logs to work out who anyone is.
Changes
If any of this changes, we'll update this page and move the date at the top.