I have a Raspberry pi that is set up as another mail server, although it's so low down in the pecking order, that it will only get used if an awful lot of things fail.
Today, I noticed that it's not on Summer Time yet. So how do you make a Raspberry aware of BST?
Google, of course. I googled "raspberry pi bst". The second result that Google showed, was my blog posting on "Summer time on the Raspberry Pi", posted three years ago.