The list that feeds the page
The checklist and the wedding site are two halves of one thing. The checklist is what you and your helpers work through; the page is what your guests see. When the venue settles from a question mark to a confirmed name, that move belongs on the live line guests will read, not only in your private plan, and a shared list makes it obvious which details are ready to publish.
That is why a checklist fits real timelines better than a fantasy one. The bands are a guide, not a rule. Compress them if your runway is short, stretch them if it is long, and keep the whole thing where the people helping you can reach it, so the morning arrives with the last checks done rather than still rattling around in your head.