By default Windows uses local time in the bios for eh, reasons. Most other operating systems use UTC, and display as the appropriate local time.
Clearly you need to change one to match the other.
To change Lubuntu: (note for readers in the future, this is reasonably likely to change soon to match some other distros, don't downvote me in a years time!):
sudo gedit /etc/default/rcS
This opens a file with a bunch of system variables. Find the line that says
UTC=yes and change it to say
UTC=no. Save. Reboot.
To change Windows:
regedit. Navigate to the key
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\TimeZoneInformation. If there's a value called
0) change it to
1. If not, create a new DWORD value called
RealTimeIsUniversal and set the value to
To decide which to change:
The pros for going UTC (the Linux/Unix/OSX/Android/iOS/nearly everything else way) are that it makes more sense generally, not least because UTC doesn't change about like local times can, and there are lots of little bugs that can be caused by using local time in the background.
The pros for going for local time (the Windows way) is that MS don't support the registry setting described above.
If you're mostly a Windows user and are just trying Lubuntu or have a few things you like it for, or Lubuntu is for enjoying computers while Windows is for the stuff you earn your bread with, then I'd recommend keeping Windows as it is, and changing Linux to match.
Otherwise, I'd recommend changing Windows to work the Linux way.