[humanpuff69]

Interesting thing if you have Ubuntu and Windows 7 on the same machine with dual boot then they show two different times although they are both on GMT/UTC+1. Usually Windows change his time to the Ubuntu's false time, and after a few days later it sync over internet with an NTP server which is correct.

its because windows save the real time (depending on your GMT+- setting) but linux save the GMT time no matter what time zone youre at . it doesnt matter if you live in GMT location but if you live in GMT+ or GMT- it will screw it . but luckily @NukerHD make a program that will sync the date with the internet so it is not really a problem

for example you have a GMT+7 time and the time is 7:09 . when you boot to linux . linux think that is a GMT time because linux save GMT time to the CMOS and move the time ahead so when you boot to linux you get 14:09 . and you correct that on linux and boot back to windows your time will be 00:09 because windows think that 00:09 is the GMT+7 time not the GMT0 time