Microsoft's developer conference BUILD 2020 was actually planned for May 19-21, 2020 in Seattle (USA) – see Microsoft Build Conference: Registration possible. Due to the Covid 19 crisis, this conference will be a 'virtual event'.
This was announced by Microsoft during the night. Here is a tweet pointing to an article from The Verge with some details.
Microsoft says its Build 2020 developer conference, planned for May 19 through May 21, will be a digital event due to COVID-19 concerns (@tomwarren / The Verge)https://t.co/zIchhHk2aQhttps://t.co/MrjHXokP5n
— Techmeme (@Techmeme) March 13, 2020
The Verge has published a statement from a Microsoft speaker explaining the reasons for this move.
The safety of our community is a top priority. In light of the health safety recommendations for Washington State, we will deliver our annual Microsoft Build event for developers as a digital event, in lieu of an in-person event. We look forward to bringing together our ecosystem of developers in this new virtual format to learn, connect and code together. Stay tuned for more details to come.