Your date stays in your browser
Your wedding date never leaves your browser. It never enters a URL, a query string, a link, an analytics event or a network request — ever, for any reason. The schedule is computed entirely on the page you are looking at, so nothing you enter is sent anywhere.
What this site stores, and when
The only thing this site ever stores is a single item in your browser's session storage, under one key, in one tab, deleted when the tab closes. It is written only at the moment you click to open the Binder, and it holds the return route and the three inputs you entered (date, guest count, shape) so the schedule can rebuild identically if you come back from the offer. Nothing derived is stored, because nothing derived needs to be. If you never open the Binder, nothing is ever written.
What the Binder's third party does and does not see
When you open the Binder you navigate to a third-party locker domain. That party sees that you came from this site and which page — nothing else. The link carries no parameters derived from your inputs, and because there is no result URL on this site, your wedding date cannot enter the address bar at the moment you leave. The offers you may be shown are curated and independent of the wedding industry.
No accounts, no cookies, no tracking of your plans
There are no accounts, no registration, no cookies that track your plans, and no analytics that record your date or guest count. What you plan here stays with you.