I use the field "Article Publish Up (Calendar)" in one of my list view to create a RSS Feed. For the Typo i choosed Date->Free and then:
D, d M Y H:i:s O
The result should be (RFC-822):
Thu, 31 Aug 2017 13:38:48 +0200
but it is:
Do, 29 Jun 2017 12:16:23 +0200
So i guess this is an issue of localizing ("Do" is german). But how can i set the correct localizing of the output?