Google IO will start on May 18, Pixel 6 launch is a big possibility Google IO will start on May 18, Pixel 6 launch is a big possibility After skipping the Google IO developer conference last year, the tech major has decided to host this year's event online and as free for all to attend. advertisement (Image: Paweł Czerwiński/ Unsplash) Registrations are now open for the IO 2021. Viewers can expect keynotes, technical sessions, workshops and AMAs during the three-day event. Google has announced the dates for this year’s Google IO developer conference. The company’s biggest annual event will be held virtually from May 18 to May 20 and will be free to attend for all.