Day Owners
Every day belongs to someone.

Leave a memory

On forever. This stays online as long as it can be kept online — no promises dressed up as guarantees. Every memory is downloadable as an open archive, so if this site ever disappears, the record doesn't.
On removal. Kept indefinitely, except what breaks the rules. Anything can be reported, and abuse or a named private person will be taken down.
On proof. Each printed card carries a code that resolves back to its day. The registry is public and nothing is quietly edited.