- Linux Mint is a free and open source operating system (OS) distribution based on Ubuntu and Debian for use on x-86 x-64-compatible machines.
During British Summer Time (BST), civil time in the United Kingdom is advanced one hour forward of Greenwich Mean Time (GMT) (in effect, changing the time zone from UTC+0 to UTC+1), so that evenings have more daylight and mornings have less.
Atlantic Standard Time (AST) = UT - 4 hours Eastern Standard Time (EST) = UT - 5 hours Central Standard Time (CST) = UT - 6 hours Mountain Standard Time (MST) = UT - 7 hours Pacific Standard Time (PST) = UT - 8 hours.