- 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.
What does gtb standard time stand for? GTB = Greece, Turkey, Belarus. Since 2011 this time zone is no  longer valid, as Belarus no longer practices daylight savings time.    EET = East European Time = GMT + â¦2 hours is valid for Turkey and  Greece.