 Uhm... There's no Ubuntu 20.12 (re @bittin1: also the last Ubuntu regular Images for this year Ubuntu 20.12 will be out in around 4 hours)
 Each month's builds have a label assigned. For example, this month's builds are/will be labeled as 21.01. The label 20.12 was given to December 2020's (last month's) builds. (re @Maik_aD: Uhm... There's no Ubuntu 20.12)
[18:08] <Maik> @rs2009 seriously, in all these year i never heard of that. I only know about daily builds.
[18:10] <Maik> @rs2009 oh wait... i think i get the picture now. :)
 https://launchpad.net/ubuntu/+milestone/ubuntu-20.12