> On 12.10.2021, at 17:41, Hooton, Gerard <g.hooton at ucc.ie> wrote: > > When I do who -b; uptime I get > > system boot 2021-10-12 17:05 > 16:36:09 up 30 min, 1 user, load average: 0.00, 0.00, 0.00 > > As you can see the boot time reported by the last command is ahead. > I have noted it is one hour ahead after a reboot. > > I have checked the system time in the BIOS before booting Linux and it is correct. What do you mean with “correct”? UTC or localtime? For me timedatectl gives me ``` $ timedatectl … RTC in local TZ: no … ``` Which means that RTC/BIOS clock is in UTC, so when booting the timezone offset is added. I heard that dual boot with Windows makes problems because Windows is setting RTC always with local time. In that case try "RTC in local TZ: yes" Do you dualboot? What is timedatectl telling you? Best Regards, Markus