Strava upload time issue

(Phil Lam - ODZ (C)) #1

I did a ride on Zwift last week where I started the ride at around 7:30am ET. My friend who lives down the street started about 30 minutes before I did, so I “joined” him and rode with him for about 30 minutes before he ended his ride. I rode for a while longer.  Both of us uploaded our rides to Strava…however, mine correctly says I started the ride at 7:30 am, whereas his says his started at 8:00am (instead of 7:00am as it should be).  Afterwards, he checked the time on his computer and it was accurate.

Any ideas of what might have happened?  Here’s my ride:


Here’s his: