Privacy policy

Last updated: 2026-05-14

Summary

• The interactive tools (week number, date math, age, etc.) run entirely in your browser. Inputs are not sent to any server.
• We use a privacy-respecting analytics tool to count page views and referrers in aggregate. No personally identifying information is collected.
• We display advertising. Ad providers may use cookies and similar technologies to show relevant ads (see "Advertising" below).

What we collect

When you visit any page, our hosting infrastructure receives standard web-server data: your IP address, the page requested, the referrer, the user-agent string, and the timestamp. We use these to detect abuse, troubleshoot errors, and produce aggregate usage stats. Server logs are retained for up to 30 days.

Cookies

This site does not set first-party cookies for analytics or personalization. Third-party services (ad networks, embeds) may set their own cookies — see the next section.

Advertising

We display ads from Google AdSense and similar networks. These networks may use cookies to serve ads based on prior visits to this site or other sites. You can opt out of personalized advertising by visiting aboutads.info/choices or by adjusting your Google Ads settings.

Children

This site is not directed at children under 13 and we do not knowingly collect data from them.

Your rights

If you are in the EU/UK, you have rights under the GDPR including access, rectification, deletion, and objection. To exercise any right, email privacy@the-calendar.net.

Changes

We'll note any material change at the top of this page with a new "Last updated" date.