there are two Sessions with date 1.1.1970 from me in the database. The sessions were postet in 2017. From Lake Dümmer See with Fanatic Blast. I am not able to edit the session becaus they won't be listet in my Admin Sessions List.
The Date 1.1.1970 appears in Session when the Track will be transmitted with GPSResult and the Session will be Split with Time Limits. The Date in GPSResult is allrigth, The Date in GPS-Speedsurfing will be set to 1.1.1970. One of my Sessions from yesterday also shows 1.1.1970.
Maybe you will be able to solve the Problem.