birthday odds .

Your day stays yours

How Birthday Odds handles your birthday selections, shared results, and website requests.

Your birthday inputs

The checker needs a month and day. It does not ask for your name, birth year, email, or location. Looking up a date and comparing it with a friend happen in your browser using the data included with the page.

Your chosen dates stay in your browser while you use the checker. Shared links and links to results can retain dates in the address bar and browser history. The application does not send your selections to its server or store them in a visitor database.

When you share a result

Sharing includes the selected month and day, its result and source period, and a link that can reopen that date. Sharing a comparison includes both dates; a challenge includes the sender’s selected date so the recipient can add their own. The date appears in the link’s fragment, the part after the # sign. Browsers do not include this fragment in the HTTP request sent to the website.

Your browser’s share sheet sends the text, link, and, where supported, a result image to the app or person you choose. Where the share sheet is unavailable, the share button tries to copy the link to your clipboard. Any service you choose has its own data practices.

Copy link places the selected link on your clipboard. Saving a birthday card creates the image in your browser. It does not upload the card to a server.

Cookies and analytics

Birthday Odds does not use analytics, advertising trackers, accounts, or cookies. Fonts are served with the site, so loading them does not contact a third-party font service.

There is no birthday-submission form, and visitors’ selections are not added to the birth dataset.

Website requests and hosting

Opening a page sends a request to the site’s hosting provider. These requests can include your IP address, browser details, and the requested page. They do not include the birthday you select in the checker. The hosting provider may keep request logs to operate the site.

Updates to this page

Last updated:

Changes to the site’s data handling will be reflected here.