That "Z" in the timestamp is Greenwich Mean Time (GMT)
When you see this in the reports that you download, you might wonder what does it all mean!
This translates to January 18th, 2023 at a time of 1:14 PM Greenwich Mean Time and 20.000 seconds after 1:14 PM.
This stamp would be 8:14 PM Eastern Time (5 afters earlier than Greenwich Mean Time)
The "Z" is what GMT was/is called in nautical time. Time zones would be broken down by letters of the alphabet and GMT was Z. There is a good Wikipedia article here on this!
The "T" in the timestamp simply means that "time" follows the date before it.