Bright? Glow? What do the WWDC taglines mean?

Apple is notoriously secretive, famous for locking down information about its products until the very moment they’re announced. Paradoxically, however, the company loves to tease us with cryptic clues and hints in its invites.

The WWDC 2026 invitations feature a glowing version of the logo for Apple’s Swift programming language, above the words, “Coming bright up.” On its developer portal, meanwhile, the company uses the line “All systems glow.” What could Apple mean by these phrases?

The words “bright” and “glow” and the glowing logo all likely point to a visual redesign. Siri is expected to get a new interface as part of the iOS 27 update, and this will reportedly include a glowing Dynamic Island to indicate it’s running.

Mostly, though, we should bear in mind that Apple likes the idea of clues more than the reality of them. It doesn’t actually want to give away anything useful, but it does like to stoke speculation. In 2022 and 2023, respectively, the WWDC taglines were “Call to code” and “Code new worlds,” which, for a conference addressing software coders, is about as uninformative as it gets.

Last year’s event was tagged “Sleek peek.” That makes sense in retrospect as a veiled reference to Liquid Glass–sleek means both smooth, kind of like glass, and elegant, which is how the company hoped we’d view the new design–but no one could have used those two words alone to work out what was coming. And if we’re honest, virtually any product launch in history could plausibly have used that tagline since they always give a peek of something which its makers would like us to think is terribly sleek.

In other words, “Coming bright up” and “All systems glow” are specific puns, but we won’t know for sure what Apple means until the keynote. By Tuesday, we’ll be able to look back and see what Apple was referring to. But it’s probably Siri.

The event starts at 10am PT on Monday. Join our WWDC26 live blog for all the latest news, rumors, and speculation.