“Add to Google Calendar” feature doesn’t create correct time entry

I think this is a timezone issue, but the feature “Add to Google Calendar” creates a link that creates an event entry with an incorrect time.

I’ve checked the Google account and calendar timezones, they are both (GMT-04:00) Eastern Time

The site and plugin show (GMT-04:00) Eastern Time as well.

This is the link for a 5:15AM event, but it creates a 1:15AM calendar entry.

https://calendar.google.com/calendar/render?action=TEMPLATE&text=Group+Power&dates=20160919T051500Z/20160919T061500Z&details=Instructor%3A++John&location=Fitness+Elite&trp=false