The date calculations you perform are processed entirely within your browser. The start dates, end dates, and results you enter are never transmitted to or stored on our servers.

We do, however, collect limited information automatically through third-party services:

• Usage and device data — pages visited, time on site, browser type, device type, approximate location, and referring website, collected via analytics.
• Cookies and similar technologies — small files stored on your device to enable analytics and advertising (see Sections 3 and 4).

We use the information we collect to operate and maintain the Site, understand how visitors use it, improve our features and performance, and to display relevant advertising that helps keep the tool free to use.

Cookies are small text files placed on your device. We use them to remember your cookie-consent choice, to measure traffic and usage, and to support advertising. You can control or delete cookies through your browser settings, and you can withdraw consent at any time. Disabling cookies will not affect the core date-calculation functionality, which runs locally.

We use Google AdSense to serve advertisements. Third-party vendors, including Google, use cookies to serve ads based on a user's prior visits to this and other websites.

• Google's use of advertising cookies enables it and its partners to serve ads to you based on your visit to this Site and/or other sites on the Internet.
• Google uses the DoubleClick DART cookie and other identifiers in the course of serving ads.
• You may opt out of personalized advertising by visiting Google Ads Settings.
• You can opt out of third-party vendor cookies at aboutads.info/choices and youronlinechoices.com.

For more information, see Google's Advertising Policies.

We use Google Analytics to understand how visitors interact with the Site. Google Analytics collects information such as pages visited and time spent, and may set cookies and process anonymized IP addresses. This data is aggregated and used only to improve the Site. Learn more in Google's Privacy Policy.

Depending on where you live, you may have the right to access, correct, or delete personal information we hold about you, to object to or restrict its processing, and to withdraw consent. Visitors in the European Economic Area (GDPR) and California residents (CCPA) have specific rights regarding their data, including the right to opt out of the "sale" of personal information. To exercise any of these rights, contact us using the details below.

The Site is not directed to children under 13, and we do not knowingly collect personal information from them. If you believe a child has provided us information, please contact us so we can remove it.

We may update this Privacy Policy from time to time. Changes take effect when posted on this page, and we will revise the "Last updated" date accordingly. We encourage you to review it periodically.

If you have questions about this Privacy Policy or your data, email us at hashcode.dev@gmail.com or visit our Contact page.