How do you change the date format for all the dates shown in a site to be in the format "day month year"? So that today would show as "24 October 2011"? I've gone to Site Actions > Regional Settings, but not sure what to select on this page. Thanks.
I don't think it's possible. You could create a webcontrol which shows the date like you want it. In case of a date in a list, you should use a content query webpart with a custom xsl
If you want to show the date like you want it in a list:
Create a Date column(Call Date1), leave it on the default view
Actually it is possible, although a bit hacky. Check-out this blog post: http://dotnet.lv/blogs/antonsm/archive/2008/12/21/change-date-format-in-sharepoint.aspx
I have been using this method a couple of times and it has worked fine in my cases.