Time Nine Privacy Policy
Time Nine's Approach to Privacy
Time Nine is a browser-based world clock and meeting planner where all time zone computation runs locally inside your web browser. Time Nine's privacy model is a direct consequence of Time Nine's architecture: your city selections, overlap calculations, and scheduling data remain within your browser from the moment you choose a city to the moment you read the overlap result.
Zero Personal Data Collection
Time Nine (tm9.net) collects zero personal data. Time Nine requires zero accounts, zero registration, and zero login. Time Nine asks for zero personal information at any point. Every visitor uses Time Nine with complete anonymity.
All Time Zone Computation Stays on Your Device
When you compare time zones through Time Nine, all computation takes place inside your browser's JavaScript engine using your browser's native Intl.DateTimeFormat internationalization API. Every clock calculation, every overlap matrix score, every best-window detection, and every analog clock animation runs locally within your browser tab on your own device. Time Nine's server delivers the page and the city database, then completes its role. All subsequent computation happens entirely on your device.
You can verify Time Nine's local-processing architecture at any time by monitoring your browser's network activity through your browser's developer tools while using the tool. The network tab displays zero data transmission related to your city selections, overlap calculations, or scheduling activity during the entire session.
What Time Nine Stores and Where
Time Nine saves two categories of preferences to your browser's local storage on your own device. Local storage is a browser-native feature that keeps data entirely on your device, separate from any network communication.
The first category is your city selection. When you add, remove, or reorder cities through Time Nine's clock interface, your current set of selected cities saves to local storage so that the same cities appear on your next visit.
The second category is your theme preference. When you choose between Time Nine's light and dark themes, your selection saves to local storage so that the same theme loads on your next visit.
Both values reside exclusively within your browser on your own device. Your Time Nine preferences stored in one browser remain in that browser. Preferences are absent from other browsers, other devices, and all Time Nine server systems. Clearing your browser's local storage removes all stored Time Nine preferences from that browser.
Shareable URLs and City Data
Time Nine generates shareable URLs that encode your selected cities directly within the web address. When you share a Time Nine link containing city names, the city information travels as part of the URL itself. The recipient's browser reads the city names from the URL and configures the overlap view locally. Time Nine's server processes the URL to deliver the correct page content, including the city names embedded in the address. The server does not store, log, or associate URL city data with any visitor identity.
Cookies, Tracking, and Analytics
Your browsing session with Time Nine involves zero cookies, zero tracking scripts, zero tracking pixels, zero advertising tags, and zero behavioral profiling. Time Nine operates without any visitor monitoring or data collection mechanism of any kind.
How Time Zone Computation Works Locally
All time zone computation within Time Nine runs locally inside your browser through client-side JavaScript. When you select cities, your browser uses the native Intl.DateTimeFormat API to compute the current time, date, and UTC offset for each selected time zone. The overlap matrix evaluates all 24 hours of your local day, counts how many selected cities fall within working hours at each hour, and identifies the highest-scoring window. Analog clock animations, digital time displays, and the color-coded timeline all render locally within your browser tab.
When you use the expand feature to view a single city clock in full-screen mode, Time Nine renders the expanded display locally within your browser. When you copy a shareable link, Time Nine writes the URL string to your device's clipboard using the browser's Clipboard API. Both operations complete entirely within your browser.
Third-Party Resources
Time Nine loads certain resources from third-party content delivery networks, including interface frameworks and stylesheet files. When your browser retrieves these resources, the hosting servers receive standard connection information as part of each request. Third-party content delivery providers operate under their own respective privacy policies. Loading resources from content delivery networks is standard practice across the web.
Server Logs
Time Nine's web servers record certain technical details during standard operation, including the IP address of the requesting device, the requested URL path, the timestamp of the request, and the browser type. Server logs contain technical request data only. Your city selections, overlap calculations, scheduling decisions, theme preferences, and all interactive activity within Time Nine are entirely client-side and entirely absent from server logs.
Internet Infrastructure
Visiting any website involves standard internet routing. Your internet service provider, DNS resolver, and network infrastructure operators can observe that a connection was made to tm9.net. This applies to every website on the internet and falls outside Time Nine's control. Time Nine uses encrypted HTTPS connections, which protect the content of data transfers between your browser and Time Nine's server.
Changes to This Policy
If Time Nine updates this privacy policy, the revised version will appear at this same address.
You may also review the Time Nine Terms of Use and the Time Nine Impressum. For a full overview of Time Nine and how the world clock, overlap matrix, and meeting planner work entirely within your browser, please visit the About Time Nine page.
