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Privacy Policy

Last Updated: December 2025

At WeekCalc.com ("we," "our," or "us"), we take your privacy seriously. This Privacy Policy explains how we collect, use, disclose, and safeguard your information when you visit our website and use our date and time calculation tools. Please read this privacy policy carefully. If you do not agree with the terms of this privacy policy, please do not access the site.

Our Privacy Commitment

WeekCalc.com is built with privacy as a fundamental principle. All date calculations are performed entirely in your web browser using client-side JavaScript. This means:

Information We Collect

Information You Provide

Calculator Inputs: When you use our calculators (Week Number Calculator, Days Between Dates Calculator, Add/Subtract Days Calculator, Workday Calculator, or Birthday Calculator), all date inputs and calculations are processed entirely within your browser. We do not receive, store, or have access to any dates you enter.

Contact Information: If you contact us through our Contact Us page, we may collect your name, email address, and the content of your message. This information is used solely to respond to your inquiry and is not shared with third parties or used for marketing purposes without your explicit consent.

Automatically Collected Information

Like most websites, we automatically collect certain technical information when you visit WeekCalc.com:

Log Data: Our web server logs may collect standard information such as your IP address, browser type, operating system, referring URLs, pages visited, and access times. This information is used for site administration, security monitoring, and understanding aggregate user behavior. It does not include any dates or data you enter into our calculators.

Cookies and Similar Technologies: We may use cookies and similar tracking technologies to enhance your browsing experience and analyze site usage. Cookies are small text files stored on your device that help us remember your preferences and understand how you use our site. You can control cookie settings through your browser preferences.

Third-Party Services

Google AdSense: We participate in the Google AdSense program to display advertisements that support our free services. Google AdSense may use cookies and web beacons to collect information about your visits to this and other websites to provide targeted advertisements. Google's use of advertising cookies enables it and its partners to serve ads based on your visit to our site and/or other sites on the Internet. You can opt out of personalized advertising by visiting Google Ads Settings or by visiting aboutads.info.

Analytics: We may use web analytics services to help us understand how visitors use our site. These services may collect information about your device, browsing actions, and patterns using cookies and similar technologies. This data is aggregated and anonymized, and does not include any dates or personal information you enter into our calculators.

How We Use Your Information

We use the limited information we collect for the following purposes:

Information Sharing and Disclosure

We do not sell, trade, or rent your personal information to third parties. We may share limited information only in the following circumstances:

Service Providers: We may share information with trusted third-party service providers who assist in operating our website, conducting business, or serving our users (such as hosting providers or email services). These providers are contractually obligated to keep information confidential and use it only for the purposes we specify.

Legal Requirements: We may disclose information if required by law, court order, or government regulation, or if we believe disclosure is necessary to protect our rights, your safety, or the safety of others.

Business Transfers: In the event of a merger, acquisition, or sale of assets, user information may be transferred to the acquiring entity, subject to the same privacy protections outlined in this policy.

Advertising Partners: Google AdSense and other advertising partners may collect information through cookies as described in their respective privacy policies. We do not control these third-party cookies and recommend reviewing their privacy policies directly.

Data Security

We implement reasonable administrative, technical, and physical security measures to protect information from unauthorized access, alteration, disclosure, or destruction. However, please be aware that no method of internet transmission or electronic storage is 100% secure. While we strive to use commercially acceptable means to protect your information, we cannot guarantee absolute security.

Because our calculators process all date calculations client-side (in your browser), your date inputs are inherently protected—they never travel over the internet to our servers, eliminating the primary vector for data interception.

Your Privacy Rights and Choices

Cookie Management: You can set your browser to refuse all or some browser cookies, or to alert you when cookies are being sent. If you disable or refuse cookies, please note that some parts of the website may become inaccessible or not function properly.

Do Not Track: Some browsers include "Do Not Track" (DNT) features. We respect DNT signals and do not track users across third-party websites to provide targeted advertising.

Opt-Out of Personalized Advertising: You can opt out of personalized advertising from Google and other participating networks by visiting aboutads.info or networkadvertising.org.

Access and Deletion: Since we do not collect or store calculator input data, there is no personal calculation data to access or delete. If you have contacted us and wish to request deletion of your contact information, please email us using the information in the Contact section below.

Children's Privacy

Our website and calculators are intended for general audiences and are not directed to children under the age of 13. We do not knowingly collect personal information from children under 13. If we become aware that we have collected personal information from a child under 13 without parental consent, we will take steps to delete that information promptly. If you believe we may have collected information from a child under 13, please contact us immediately.

International Users

WeekCalc.com is operated from the United States. If you are accessing our site from outside the United States, please be aware that your information may be transferred to, stored, and processed in the United States where our servers are located. By using our site, you consent to the transfer of information to the United States, which may have different data protection laws than your country of residence.

Third-Party Links

Our website may contain links to third-party websites, including authoritative sources like ISO.org and time.gov. We are not responsible for the privacy practices or content of these external sites. We encourage you to review the privacy policies of any third-party sites you visit.

Changes to This Privacy Policy

We may update this Privacy Policy from time to time to reflect changes in our practices, technology, legal requirements, or other factors. We will notify you of any material changes by posting the new Privacy Policy on this page and updating the "Last Updated" date. Your continued use of WeekCalc.com after changes are posted constitutes your acceptance of the revised Privacy Policy. We encourage you to review this Privacy Policy periodically to stay informed about how we protect your information.

Contact Us

If you have questions, concerns, or requests regarding this Privacy Policy or our privacy practices, please contact us:

We will make reasonable efforts to respond to your inquiry within 30 days.

Your Acceptance of These Terms

By using WeekCalc.com, you signify your acceptance of this Privacy Policy. If you do not agree to this policy, please do not use our site. Your continued use of the site following the posting of changes to this policy will be deemed your acceptance of those changes.