https://techcrunch.com/2020/03/06/citing-concern-over-covid-19-y-combinator-moves-demo-day-online/

Startup accelerator Y Combinator has moved its famed demo day online, citing a “growing concern over COVID-19,” or coronavirus. The demo day has historically drawn crowds of Silicon Valley elite, journalists, and both national and international venture capitalists to watch more than 100 startups come out to the world. 

“While we won’t be able to recreate every aspect of Demo Day, we’ll try our best to create an amazing experience for our founders and investors,” Y Combinator said in a memo. Y Combinator’s 30th annual demo day will be pre-recorded and released to investors on Monday March 23, per the memo.