Had to search around to find the existance of a TimeStamper transformer. It's currently called DateTimeStamper and has more clear settings about the Timezone.
I could find help on the Timestamper in the 2016 version of FME and not in the 2017.
Hi @marias The DateTimeStamper has defaulted to UTC since FME 2020. I don’t have anything older than 2019 installed locally but that also has the option of setting the time stamp in UTC.