Elon Musk says Tesla AI Day pushed to Sept 30

FILE PHOTO: Tesla CEO Elon Musk attends the Tesla Shanghai Gigafactory groundbreaking ceremony in Shanghai, China January 7, 2019. REUTERS/Aly Song/File Photo

(Reuters) - Electric vehicle major Tesla Inc Chief Executive Officer Elon Musk said on Thursday that Tesla's AI Day has now been pushed to Sept. 30.

"Tesla AI Day pushed to Sept 30, as we may have an Optimus prototype working by then," he wrote on Twitter, almost two weeks after he announced the date of Aug. 19.