Microsoft is holding a 50th Anniversary Copilot livestream today at 12:30PM ET / 9:30AM PT on April 4th, the same day Microsoft founders Bill Gates and Paul Allen started the company in 1975. Dubbed “Introducing your AI companion,” it’s set up for Microsoft to show off some significant updates to its Windows AI assistant.

Microsoft is celebrating its 50th anniversary, and the company is having some fun with it. The iconic Windows 95 logo was resurfaced, there is a themed version of Solitaire available, and Bill Gates even posted the source code for the company’s first operating system, Altair Basic. Microsoft’s Copilot is even getting some love.

Microsoft is holding a special 50th anniversary Copilot event on April 4 at 9:30 AM PT. The event will be live streamed, and this is how you can tune in.