Uploaded an activity from yesterday and it is now showing with today’s data. Edit the date field from the planner, saved, but it still shows today. If I edit again the date is still of today. It seems that date field edits are not recording.
To edit a completed workout/ride activity view it and select the Download icon in upper right which will export the data to a FIT file.
Next visit FitFileTools.com and use the Time Adjuster to correct the date then import back in.
Also, double-check that your timezone settings are correct under Account Settings