Schedule homepage banner + in-menu ad swaps ahead of time - they flip server-side at the exact minute, no deploy, no one awake at midnight.
Ad takeovers used to be code deploys: someone had to ship a build at the go-live minute, and a missed deploy meant the wrong brand on the homepage. Sophie's Aug 1 request ('launched for August 1st, 12AM') is exactly this shape.
A live view of every ad campaign set - what's LIVE now, what's SCHEDULED and when it flips, and what ran before. Campaign sets are data, not code: the website asks the worker which set is active on every visit, so a swap is just a row with a future timestamp. Each scheduled card has a one-click 'Preview this state on the live site' link (only you see the future state; customers are unaffected).