HALFDAY / LEGAL

Privacy Policy

Last updated: September 6, 2026

What the calculator processes

The birth date you enter is processed locally in your browser to calculate calendar dates. The current version does not send, store or add that date to the page URL.

Accounts, uploads and payments

The current tool has no accounts, file uploads, payment flow or server-side user database.

Cookies and analytics

Cloudflare Web Analytics reports aggregate visits and page performance. The calculator also sends limited usage events to a first-party endpoint hosted by Cloudflare: a successful manual calculation, opening the example, or copying a result. Event fields contain only the event name, homepage path, manual/example source, and an explicit test/unclassified traffic label.

These product events do not contain a birth date, age, result date, entered text, user ID, full referring URL or query string. We do not set analytics cookies, store visitor identifiers, record sessions or use advertising trackers. Aggregate events are stored in Cloudflare Workers Analytics Engine for up to three months. Unclassified events are not proof of unique human visitors.

Browser privacy tools can block analytics without stopping the calculator. Cloudflare processes hosting and analytics information as described in its privacy policy. No advertising or additional third-party analytics service is enabled by this update.

Hosting and security logs

This site is hosted on Cloudflare. Cloudflare may process standard technical information such as IP address, browser type, requested URL and request time to deliver, secure and maintain the site. See Cloudflare's privacy policy for details about its processing.

Children

The calculator can be used by families, but it is not designed to collect personal information from children. Do not enter additional identifying information anywhere on the site.

Changes

This policy will be revised if the site begins using analytics, advertising, accounts or other third-party services.

Operator and contact

Halfday is an independently operated web tool available at halfbirthday.app. Privacy or site questions can be sent to contact@halfbirthday.app.