PG Bug reporting form <noreply(at)postgresql(dot)org> writes:
> In some areas of UTC+8, "CST" in the log is recognized as the wrong time
> zone when importing these logs.
With the default set of time zone abbreviations, CST will be taken as
US Central Standard Time (UTC-6). If you don't want that, set up an
alternative timezone abbreviation file. See
https://www.postgresql.org/docs/current/datetime-config-files.html
regards, tom lane