Siri spills the beans on WWDC16

The Apple Inc. logo is displayed outside as attendees line up to enter the Moscone Center before the start of the Apple Worldwide Developers Conference (WWDC) in San Francisco.
Michael Short | Bloomberg | Getty Images

Apple's latest operating systems could debut as soon as June 13, if a Monday rumor from Siri is any indication.

Ask Siri the date of Apple's next Worldwide Developers Conference, and she'll answer, "The Worldwide Developers Conference (WWDC) will be held June 13 through June 17 in San Francisco. I can't wait!" reports technology blog 9to5Mac. If true, that's news not even available on Apple's website, which still lists information from last year's June 12 conference.

Apple did not immediately respond to CNBC's request for comment on whether the Siri announcement was intentional.

Watch out, Apple: A Siri competitor emerges
Siri app
Apple's Siri coming to desktop Macs: Report

WWDC is aimed at software developers of programs for the iOS and OS X platforms, and in 2015 featured keynote announcements, like Apple Music, from Apple executives and sessions on everything from designing apps for the Apple Watch to the introduction of new fonts. According to 9to5Mac, iOS 10 and OS X 10.12 could be unveiled at the 2016 iteration.

Demonstrations of new MacBooks and updates for Apple TV could also be in the cards for WWDC16, reported 9to5Mac.

For more on Siri's WWDC leak, see the full story at