On a Ctrlx Core running the 1.10.x firmware, I switched off time sync and set the date to "1/1/1970". After a re-login I re-enabled tyme-sync to "pool.ntp.org", date and time were synced correctly. In a second try, I again switched off time sync and set the date to "1/1/1970". After a reboot, date and time were set correctly, but time-sync was still off. So it probably synced to my router or something.
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