The Ethereum Foundation has postponed Devcon VI until 2021 and will host it in Bogota, Colombia.
Source: https://cointelegraph.com/news/devcon-6-2020-is-a-write-off-lets-try-2021-in-columbia
Devcon 6: 2020 is a Write-Off, Let’s Try 2021 in Columbia
May 29, 2020
CoinTelegraph