The default configuration is for Windows to display the selected time zone time and store it in the BIOS, but Ubuntu stores the UTC time in the BIOS and displays the selected time zone time.
There is some hidden setting to have Windows to save UTC time in the BIOS but it doesn't work quite right, it's not recommended to use it. There is a setting for Ubuntu to store the selected time zone time in the BIOS, that works fine.
/etc/default/rcS and change the utc line to
If you do the installation in expert mode it's actually asking you if you want the BIOS time in UTC or not.