My Forerunner froze. I turned it off and back on. It said Dec 31 4:00 PM. It is July 20 11:15 AM. I went ahead and started my hike and my watch synced to GPS at some point during my hike. However, the date of the activity was saved as Dec. 31. I changed the date and time in Garmin Connect so now the activity shows up for today, connected my watch to my computer and synced several times but my watch still says 12/31 for the activity. My steps from the hike are not showing up in steps either. It shows the walk but there are no steps counted. Does anyone know how to change the date of an activity on a Forerunner?