Publishing, sharing, and the change that will come
Publish when the facts are true. A draft has no guest-visible link, so nothing leaks early; once live, the page gets a shareable address. Send it into the WhatsApp group, paste it under the event post, print a QR if you are also doing paper. One link, one version of the truth.
Plans will change; they always do. This is the argument for the page over the poster. Update the time or the gate once, and the next guest to open it reads the corrected version, whether that is tomorrow or the morning of the party. For anyone who memorised the old details, send the changed line directly: on a page, that message is one sentence instead of an apology tour.