- 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.
GMT , Z, Zulu and UTC all mean the same thing - the current time at the Prime Meridian. When converting from GMT to local time, first consider the GMT as military time (24 hour clock). Next, the local time is converted to an AM/PM time, if needed. Consider 2300Z as 2300 hours (basically changing Z time to a 24 clock).