timestamp in the name of the output is not local

[hhxxttxs-tang]

My local time is Dec 18, 20201, however, as I just tried the auto-save output plugin. the log files created are something like:

2021-12-19T035318.106Z - OS default.txt
2021-12-19T034753.092Z - bash.txt

1. obviously the date is wrong.
2. What does the string between "T" and "Z" mean?
3. Can the time information be added to the file name?