Here is a small list of conferences I put together for 2021, as I was looking for speaking opportunities, with a particular focus on Europe and America. Hope this helps!
DjangoCon EU 2021
02-06 June 2021, remote. CFP under way, ending 2020-04-01 23h59 UTC.
Also looking for volunteers to help organise & run the event.
JSConf Budapest 2021
23-24 September 2021, Budapest. CFP under way, ending March 31th 2021.
DjangoCon US 2021
October 2021, remote. No CFP announced yet.
PyCon UK 2021
No date announced except for “2021”. Cardiff. No CFP announced yet.
Nordic JS 2021
October 2021, Stockholm. CFP under way, no deadline.
18-20 May 2021, Lyon, France. Looks like there might not be any CFP this year.
HalfStack London 2021
November 2021, London. CFP under way, no deadline.
HalfStack Phoenix 2022
January 2022, Phoenix. CFP under way, ending 15/09/2021.
HalfStack Newquay 2022
July 2022, Newquay (/ˈnjuːki/) (UK). CFP under way, no deadline.
HalfStack New York 2022
August 2022, New York. CFP under way, ending 30/04/2022.
HalfStack Vienna 2022
September 2022, Vienna. CFP under way, ending 31/05/2022.