It looks like UTC time can be enabled with a flag, but should not be the default:
GLOBAL OPTIONS
--utc
Display dates and times in UTC. By default, local time is used.
On my systems, snapshots are labeled with the correct time, and I am in the EST timezone.
This isn’t the first time this has come up, actually: Snapper problems - #8 by lum1nuss
@lum1nuss did you ever figure out why your snapshots are on UTC?
@Firas is your system time correct? Check the output of the date
command.