It appears Date Modified is local time, but the embedded time is something else.
Looking at the files, it isn't even GMT, but negative GMT offset.
For example, my last recording started at 3:10 PM EST today 11/4/2018 according to Date Modified. The Date (shown if I select Date as a field in the file list or Details tab of file Properties) shows 11/4/2018 10:10 AM. That's 5 hours BACK, not forward. GMT would be 5 hours ahead and therefore the Date stamp would be 8:10pm GMT
On the other hand, my last recording on 10/29/2018, before we went back to EST, the Date Modified is 6:56pm but the Date is 2:56pm which is 4 hours back. GMT would be 4 hours ahead during DT, not back. Therefore the date stamp woudl be 10:56pm GMT.
Honolulu would be 5 hours behind us, so current time in EST being 7:27pm is 2:27pm there.
They don't observe daylight savings time, so they would be 11 hours behind us last week, not 10.
I think GMT was intended, but someone got the sign wrong and may have also ignored adjusting the date when crossing from PM to AM.
I thought maybe it is China time. They are +8. If they were +12, that might explain it where the time would be shifted up 16 hours for EDT, and 17 hours for EST, but forgot to adjust the date accordingly.