[redacted] ~ # timedatectl
      Local time: So 2190-09-12 10:37:28 CEST
  Universal time: So 2190-09-12 08:37:28 UTC
        RTC time: Mi 2018-10-10 08:30:12
       Time zone: Europe/Berlin (CEST, +0200)
 Network time on: no
NTP synchronized: no
 RTC in local TZ: no

[redacted] ~ # timedatectl set-time "2190-09-12 10:37:28 CEST"
[redacted] ~ # timedatectl set-time "2018-10-10 10:37:28 CEST"
Failed to set time: Failed to set local time: Invalid argument