thank you
thank you
I have this problem occasionally, on two 935s. This is a very annoying defect, it affects alarms timing, obviously. Garmin was unable to troubleshoot it, offering a refurbished watch. I got a refurbished watch later, when the hr sensor cracked (another known defect), and the new watch also has this time problem, unfortunately.
I found two things that help: soft restart followed by sync to gps
Or
Sync to connect mobile
Please take no offence, but I have to ask - have you been outdoors when you enabled the GPS, and did you wait till you got the GPS lock?
Also read here some more details: FORERUNNER 935 OWNER'S MANUAL - Syncing the Time with GPS
Another option is setting the time manually: FORERUNNER 935 OWNER'S MANUAL - Setting the Time Manually